Play time:
1) Mario & Luigi: Bowser's Inside Story (25:58)
2) Apollo Justice: Ace Attorney (25:49)
3) Ace Attorney Investigations: Miles Edgeworth (25:21)
4) Kingdom Hearts: 358/2 Days (23:45)
5) Professor Layton and the Curious Village (21:53)
6) The Legend of Zelda: Ocarina of Time 3D (20:58)
7) The Legend of Zelda: Link's Awakening (20:50)
8) Professor Layton and the Lost Future (19:11)
9) Nintendogs + Cats (18:01)
10) Kingdom Hearts Re:coded (17:20)

And my "No. Times Played" list pretty much only has non-games on it, so I'm not gonna bother posting it right now.

This is just all games played and for my im not including Mii plaza as its a bit shallow, but kudos to those who do.

Longest Play Time

1) Dragon Quest V (59:16)
2) Samurai Warriors: Chronicles (55:01)
3) Mario's Picross (44:40)
4) Devil Survivor Overclocked (20:26) lol even though im not very far. I have left the game on while i talk to people.
5) GTA Chinatown Wars (20:02)
6) Radiant Historia (16:52) Took longer to beat this but i had originally started on the DS
7) Zelda: Link's Awakening (15:33)
8) Zenonia (11:40)
9) Let's Golf 3D (11:29)
10) Dragon Quest IX (11:01) Again there is more play time but part of that is on the DS

Times Played

1) Samurai Warriors Chronicles (82)
2) Dragon Quest V (63)
3) Mario's Picross (57)
Tied 4) GTA Chinatown Wars (26)
Tied 4) Lets Golf 3D (26)
6) Donkey Kong (20)
Tied 7) Zenonia (19)
Tied 7) Zelda Link's Awakening (19)
9) Radiant Historia (16)
10) Devil Survivor Overclocked (16)

By Total Play Time:

1.) Nintendogs + Cats
2.) Ocarina of Time 3D
3.) Pilotwings Resort
4.) New Super Mario Bros.
5.) Super Mario Land
6.) Legend of Zelda: Link's Awakening DX
7.) Super Mario 64 DS
8.) Donkey Kong
9.) Animal Crossing: Wild World
10.) Cave Story

By Play Frequency:

1.) Nintendogs + Cats
2.) Super Mario Land
3.) Pilotwings Resort
4.) Donkey Kong
5.) Ocarina of Time 3D
6.) New Super Mario Bros.
7.) The Legend of Zelda: Link's Awakening DX
8.) 3D Classics: Xevious
9.) Cave Story
10.) Animal Crossing: Wild World

Play time:

1: Pokedex 3d 30 hrs
2: Warioware diy 15 hrs
3: Links awakening dx 13 hrs
4: Castle of magic 12 hrs
5: Super street fighter 4 10 hrs
6: Warioware snapped 8 hrs
7: Nintendo video 7 hrs
8: Photo dojo 7 hrs
9: Super mario land 6 hrs
10: 3d classics excitebike 4 hrs.

Remember, that's excluding the built in apps.

By no of times played:

1: Pokedex 3d 129 times
2: Nintendo video 53 times
3: Warioware diy 34 times
4: Warioware snapped 29 times
5: Super street fighter 4 28 times
6: Super mario land 28 times
7: Super mario 3d land e3 video 27 times
8: Links awakening dx 24 times
9: Photo dojo 22 times
10: Castle of magic 22 times

Time played:
1.ocarina of time 28:06
2. Internet browser: 26:01
3.pokemon White : 24:56
4. Super monkey ball : 19:41
5. Streetfighter 4 : 8:37
6. Dragonquest monster joker : 6:42
7. Pilotwings resort : 4:32
8. Rayman: 4:12
9. Ridgeracer 3:10
10. Legend of zelda 2:54

I'd list mine, but most of the hours I've put into my games was on my previous 3DS that messed up, so my numbers aren't accurate.

Play Time.

1. Zelda: OoT 3D,
2. Ghost Recon: Shadow Wars.
3. Zelda: Spirit Tracks.
4. Final Fantasy Tactics Advance 2.
5. Zelda: Links Awakening DX.
6. Splinter Cell 3D.
7. Shantae: Riskys Revenge.
8. Worms Open Warfare 2.
9. Donkey Kong 94.
10. Starship Patrol.

No. of Times Played.

1. Ghost Recon: Shadow Wars.
2. Zelda: OoT 3D.
3. Zelda: Links Awakening DX.
4. Splinter Cell 3D.
5. Worms Open Warfare 2.
6. Starship Patrol.
7. Final Fantasy Tactics Advance 2.
8. Donkey Kong 94.
9. PES 2011 3D.
10. Shantae: Riskys Revenge.

1) Pokemon Black: 173:30
2) The Legend of Zelda: Ocarina of Time 3D: 153:10
3) Super Mario 64 DS: 45:52
4) Internet Browser: 43:18
5) nintendogs + cats: 36:05
6) The Legend of Zelda: Spirit Tracks: 26: 42
7) Mario & Luigi: Bowser's Inside Story: 22:22
8) Animal Crossing: Wild World: 18:46
9) Cave Story: 16:24
10) The Legend of Zelda: Four Swords: Anniversary Edition: 14:51

91 Titles:
Total Time played: 295:10

Mario Kart DS: 26:50
Internet Browser: 19:02
Yu-Gi-Oh! 5D's STARDUST ACCELERATOR: 16:33
Pokemon White Version: 16:19
Professor Layton and Pandora's Box: 14:53
The Legend of Zelda Ocarina of Time 3D: 14:12
RABBIDS 3D: 12:46
Pilotwings Resort: 11:02
SUPER STREET FIGHTER IV 3D EDITION: 10:32
Nintendo eShop: 10:14

Without Apps:

MARIO KART DS : 25:50
Yu-Gi-Oh! 5D's STARDUST ACCELERATOR: 16:33
Pokemon White Version: 16:19
Professor Layton and Pandora's Box: 14:53
The Legend of Zelda Ocarina of Time 3D: 14:12
RABBIDS 3D: 12:46
Mario and Luigi Bowser's Inside Story: 12:02
Pilotwings Resort: 11:02
SUPER STREET FIGHTER IV 3D EDITION : 10:32

No. Times Played:

Activity Log - 179
Internet Browser - 173
StreetPass Mii Plaza - 127
Nintendo eShop - 110
Pokedex 3D - 93
Friend List - 90
Nintendo Video - 55
System Settings - 53
Mario Kart DS - 52
Super Mario E3 Video - 43

Without Apps:

StreetPass Mii Plaza : 128
Pokedex 3D: 93
Nintendo Video: 55
MARIO KART DS: 52
Super Mario E3 Video: 43
Animal Crossing E3 Video: 42
Pilotwings Resort: 39
3D Classics Excitebike: 37
Super Mario Bros. 34
Mario Kart E3 Video 32

By Play time:

1. Phoenix Wright Ace Attorney - 9:40
2. Zelda: Four Swords - 8:16
3. Internet Browser - 4:47
4. Super Mario Land - 2:55
5. Super Mario Land 2 - 2:44
6. Kirby's Dream Land - 2:17
7. Pokedex 3D - 1:28
8. Alleyway - 1:08
9. Children of Mana - 0:36
10. Street Pass Mii Plaza - 0:29

Total Play Time - 551 hours 41 minutes
Titles Played - 119

1.Super Street Fighter IV - 139.55 (How the hell that happened...)
2.Dead or Alive Dimensions - 46.56
3.The World Ends With You - 42.36 (Missed out on it before, now my joint favourite DS game with Okamiden!)
4.The Legend of Zelda Ocarina of Time 3D - 36.42
5.Okamiden - 28.35
6.Mario and Luigi Bowsers Inside Story - 28.13
7.Ridge Racer 3D - 23.48
8.Pilotwings Resort - 16.51
9.Nine Hours, Nine Persons, Nine Doors - 14.30 (God that game is freaky!)
10.Rytmik - 12.40

Ocarina of Time 3D - 40:16
Zelda: Link's Awakening DX - 22:07
Asphalt 3D - 20:10
DRAGON QUEST IX - 17:50
Nintendo 3DS Camera - 6:05
Super Scribblenauts - 5:58
Nintenedo 3DS Sound - 4:59
Nintendo eShop - 2:34
System Settings - 2:28

75 Titles - 789hrs 09mins

1st) Internet Browser - 217:34 (don't ask me how I racked up that many hours...)
2nd) Ridge Racer 3D - 75:38
3rd) Resident Evil Mercenaries - 55:37
4th) Nintendo 3DS Sound - 49-57
5th) Ocarina of Time 3D - 43:57
6th) Ghost Recon Shadow Wars - 40:57
7th) Nintendo eShop - 34:17
8th) Plants vs. Zombies - 32:59
9th) Pilotwings Resort - 24:43
10th) Nintendo 3DS Camera - 10:35

Without apps
1st) Ridge Racer 3D
2nd) Resident Evil Mercenaries
3rd) Ocarina of Time 3D
4th) Ghost Recon Shadow Wars
5th) Plants vs. Zombies
6th) Pilotwings resort
7th) Metal Torrent - 8:31
8th) Zenonia -8:26
9th) Zelda: Four Swords - 8:24
10th) AiRace - 8:08

Time Played:
1. Pilotwings: 19:09
2. Partners in Time: 13:51
3. Olympic Winter Games: 10:50
4. Sonic Rush Adventure: 10:34
5. Ocarina of Time 3D: 9:52
6. Mario Party DS: 8:52
7. Mario's Picross: 7:15
8. Face Raiders: 6:44
9. Sonic Chronicles: 6:06
10. Camera: 4:56

No. of Times Played:
1. Camera: 39
2. Activity log: 33
3. Internet browser: 28
4. Face raiders: 27
4. Notifiactions: 27
4. Mario Party DS: 27
7. Mii Maker: 18
7. AR Games: 18
9. Partners in Time: 17
9. Ocarina of Time 3D: 17

1. Ocarina of Time 3D - 136 hrs
2. Zelda: Four Swords Anniversary Edition - 25 hrs
3. Super Street Fighter IV - 24 hrs
4. Star Fox 64 3D - 21 hrs
5. Resident Evil: The Mercenaries 3D - 20 hrs
6. Nintendo 3DS Sound - 16 hrs
7. Internet Browser - 12 hrs
8. Nintendo eShop - 9 hrs
9. StreetPass Mii Plaza - 8 hrs
10. Mii Maker - 8 hrs

1. Pac-Man & Galaga Dimensions - 32:31
2. PilotWings Resort - 23:21
3. Ghost Recon Shadow Wars - 20:40
4. Super Monkey Ball 3D - 13:02 (I dunno how)
5. Resident Evil The Mercenaries 3D - 11:25 (still playing)
6. Mario's Picross - 11:10 (still playing)
7. Star Fox 64 3D - 10:43
8. Solatorobo: Red the Hunter - 9:43 (first half, still playing)
9. Kirby Mass Attack - 9:38 (still playing)
10. Rayman DS - 9:37 (Read; DS. I'm surprised by that time. I had about half the game done before I switched to the 3DS)

56 Times - PilotWings
44 Times - Pac-Man & Galaga
32 Times - Mario's Picross
29 Times - Super Monkey Ball 3D
28 Times - Ghost Recon Shadow Wars
21 Times - Donkey Kong (GB VC)
20 Times - WireWay (DS)
20 Times - Dream Trigger 3D
18 Times - Rayman DS
16 Times - Art Style: precipice

You can play 10 games on the 3DS?

By play time:

Samurai Warriors Chronicles: 17:35
Ghost Recon Shadow Wars: 13:44
PES 2011 3D 11:22
Dead or Alive Dimensions 11:17
Dragon Quest VI 9:00
Final Fantasy III 8:19
Dragon Quest Monsters Joker 2 7:35
Dragon Quest Monsters Joker 7:34
Military History Commander Europe at War 7:30
Zenonia 6:09

I would have played all the DS/ DSiWare games for twice as long as that, as for various reasons I still use my DSi for gaming.

Virtual Console top 10:

Tennis 4:35
Game and Watch Gallery 4:34
Radar Mission 2:17
Super Mario Land 2:12
Alleyway 2:11
Pac-Man 2:00
Qix 1:42
Mario's Picross 1:36
Baseball 1:32
Super Mario Land 2 1:22

^Yay, useless posts.

Just wondering, a lot of these lists end with games in the 10 hour range, and only one other seems to have Star Fox 64 3D on it. Did everybody pass on it (wouldn't blame you) or did it end up lower than the top ten for you?

I'm at 10-ish hours for the game myself, and could put a few more hours in. Just wondering how much milage the game gets for people that did invest (maybe playing for the first time, also).