Metroid, it's my new favorite game ever since I discovered it on the eShop.
I also like Super Mario Land: Six Golden Coins, it's my favorite GameBoy game, maybe even classic 2d Mario game. but I don't own it on the 3DS VC..
This could go on, favorites that are also available on the 3DS..

So I will just say my favorite 3DS exclusive: Super Mario 3D Land.

Super Mario 3D Land

http://www.nintendolife.com/forums/3ds/now_that_ign_has_liste...

1. Professor Layton and the miracle mask
2. Kid Icarus uprising
3. New Super Mario Bros 2
4. Starfox 64 3D
5. The legend of Zelda ocarina of time
6. Super Mario 3D land

Zero Escape: Virtue's Last Reward. Arguably the best story to grace the entertainment spectrum, regardless of medium. It was definitely my favorite experience on the 3DS.

If it weren't for that, I'd say Kid Icarus Uprising or Dead or Alive: Dimensions.

Kid icarus uprising

RE:M

It's still the only game has over 100 hours worth of playing time on my 3ds.

mario kart 7

I'm new to the 3DS, more or less, and so far my favorite game is the Legend of Zelda Ocarina of Time 3D. I've already played through it twice. Only other game I've played is New Super Mario Bros. 2, it's not bad but it kinda felt underwhelming.

New Super Mario Brothers 2 and Super Mario 3D Land (soon to be Sticker Star too) are my favorites currently. My favorite games to play on the 3DS are not 3DS games though. As for 3DSWare, Mutant Mudds stands at the top easily.

Kid Icarus Uprising. I haven't seen a better game for the 3DS since.

GOTTA agree with you there!

Kid Icarus: Uprising, uncontested.
Ask me again at the end of the 3DS's life and I'd be surprised if my answer isn't the same.

i have a lot of the 3ds games. I mean probably half of them between me & my kid. I love Mario Kart 7, New Mario Bros. & Starfox. However none of my games keeps my 3ds in my paws like super monkeyball 3d does. I don't know, i just really love that game. It'll cost you $20 or less so do yourself a favor & get that game there if you have any affinity for the monkeyball series.

Also would like to add that my favorite eShop game is either "Let's Golf 3d" or "Sakurai Samurai."

All this love for Kid Icarus makes me sad that so many critics were too lazy to learn the controls.

Regardless, I'm gonna join the crowd and rank my games.

1. Kid Icarus: Uprising
2. Super Mario 3D Land
3. Nano Assault (I'm honestly not sure this would be here if it was a first-party attempt, but it's such a commendable effort with very tight execution for an indepedent release)
4. Kingdom Hearts 3D: DDD (New to the KH series. Some fans seem to dislike this one)
5. Crush3D (Again, it's a port, but I'm new to the game and it's still an ingenious concept)
6. New Super Mario Bros 2
7. Mario Kart 7 (This is actually ranking quite high because I'm not fond of racers)
8. Steel Diver (Underrated as all hell. The initial campaign was short, but there's plenty of replay value, and the game had really good production values)
9. Sonic Generations (Short campaign (although there's a lot of replay value) and the level design could've been a lot better, but I still enjoyed it.)
10. Pilotwings Resort (Not enough replay value for a 5-7 hour game. I only payed $5, but something else seems to detract which I can't say)
11. Bit Trip. SAGA (6 brilliant games made portable is a positive. Lag issues is a negative.)
12. Super Street Fighter IV: 3D Edition (Lack of unlockables, awful online community and the fact that I've played it before a lot on X360. Still worth $10 though.)
13. Cave Story 3D (Cave Story is brilliant as ever, but Jesus Christ this was not worth the cash)

Not yet ranked (3DS still in shop): Professor Layton and the Miracle Mask
OOT3D (Where the hell is my game eBay?)

So far satisified with my line-up as the weakest in the lot being ports.

As of this moment in time, I'd give it to Mario Kart 7. It's a nice fun game, technically brilliant in all aspects and with the best choice of levels in the entire franchise. It's also probably the 3DS game I spent most time playing so far.

Dead or Alive Demensions or Resident Evil Revelations. They're both a lot of fun.

The Legend of Zelda OoT 3D: The reason I purchased my 3DS or Resident Evil Revelations. I can't decide.

I'll join the listing trend, since I can't quite decide on one. In no particular order:

• Theatrhythm Final Fantasy - minor gripes aside, great tracks, I like the collectible cards and music player
• Tales of the Abyss - funny characters, in-depth story, good party customisation for battles
• Code of Princess - cool game to mess around in, playing as various different characters with a range of fighting moves
• Style Savvy: Trendsetters - surprisingly fun shop management with an online plaza/shop feature

theatrythm, KIU, MK7, NSMB2 or 3D Land, IDK but I really want to get better at RER and MGS to see if they make it to #1