Favorites: Nintendo, Valve
Least Favorites: Sony, EA

Fav: Sony, Bethesda
Least: EA, Nintendo

Favorite:
Nintendo and all their subcategories
Level 5 (If they dont goes as a subcategory of Nintendo)

Dislike:
Microsoft

Hate:
Sony

Favorites:
Nintendo (including all their developers)
Sony (including all their developers)
Capcom (just some of their games, the company as a whole sucks)

Least Favorites:
EA
Activision
Square-Enix

Favorite: Nintendo and all its subcatagories.
Least favorites: EA, Square Enix, Sony.

Favorite: Nintendo and its everything (who would have guessed?)
Least favorites: EA and Microsoft, EA because of trying to install thousands of add-ons on my computer and Microsoft because of that goddamn Windows LIVE.

Forgot about Sony, don't like Sony.

Like:
Atlus, Platinum Games, Konami, Aksys, Nintendo, Capcom (Love their games, hate their marketing), Sega, X-Seed.

Dislike:
Capcom(Love/hate relationship), THQ, UFO, Square Enix(Love their releases of old games but hate their new ones), Microsoft, Blizzard, Lucas Arts, EA and Activision.

Why would anyone hate Atlus is beyond my knowing..

Ubisoft Montreal is rapidly becoming a favorite of mine. I mean, I never got into Tom Clancy but regardless. They made my favorite current gen series, Assassin's Creed and are releasing an actually interesting console FPS in 2012 (Far Cry 3) and next year are releasing my most hyped game for 2013(that I actually know is coming out next year at least) Watch Dogs.

Honestly with the Wii U, I'd almost argue Ubisoft as a whole has been that awesome lately.

Wait, what?

Like:
Nintendo- No brainer
Atlus- Dokapon, Trauma Center
Level 5- Professor Layton

Hmm...:
Capcom- I love Ace Attorney and Okami, but I hate that Capcom focuses almost entirely on Street Fighter and Capcom Vs. I personally don't play Mega Man, but I know people who are and it was a huge disapointment that Mega Man Legends 3 was cancelled. I myself am upset about their not localising Ace Attorney Investigations 2.
Sega: As much as I love Sonic, his games haven't been that great. I know that Colors and Generatios apparently changed this, but I havent played them to judge for myself.

Hate:
Microsoft and Sony: For their copying Nintendo and their annoying fanboys and graphics whores.
Activision: Call of Duty. I liked when I was about World War II, but now it caters only to screaming twelve year-olds.
Rare: For becoming a shadow of it's former self.

Favorite Nintendo
Least favorite activision

Favorites:Intelligent systems, and hal labs. Oh, and the one with the chubby plumber. :3
Least favorite: Sayga, they ain't anywhere near as fun as they used to be. They still have potential though, hopefully they use it well. (Don't kill me prosody)

Sega doesn't only make Sonic games you know...
This Gen they've released (not mentioning sonic games)
Vanquish, The House of the Dead Overkill, Alien: Colonial Marines and Infestation, Rhythm Thief, Valkyria Chronicles and let's not forget Bayonetta, etc.

Sure they've made some bad decisions and Sh*tty games(movie licensed), but you know, those mentioned above are high quality stuff, and that wins my heart anyday.

This reminds me that I missed when Sega didn't just happen to publish games and you know, had their game studios make games. But of course like Square Enix I look at some of their efforts this gen and think maybe that's for the best. According to Wiki, they literally have twice as many studios as they do announced games in development. And like half of those games in development, Sega is just publishing.

Like: Intelligent Systems (for Warioware DIY and Advance Wars) & Namco (I regained faith in them since Shiftylook started)

Hate: Capcpom, Activision, EA, and Bandai (Merged with Namco in 2006, modern Namco Bandai is mostly Bandai with hardly any Namco, I'm glad there's at least Shiftylook)

I wasn't talking just about sonic... I mostly meant that after they stopped producing consoles, they suffered a major blow in quality.

ironically in 2002 this led to Sega re-releasing EVERY DREAMCAST GAME POSSIBLE and every game that was probably an updated version of a cancelled in development Dreamcast game (Super Monkey Ball 2, Shenmue 2, Jet Set Radio Future)

favorite: nintendo, valve
least favorite:capcom, sony, EA, two tribes, microsoft, everything that isn't nintendo

Favorite: Nintendo, Sony, Bethesda
Least Favorite: EA, Activision

Favorite: Nintendo

Least favourite: at the moment it is Capcom. Don't get me wrong I loved what they did with Zelda and I like some of their games; but they have been treating their fans like shit.