No order:

Nintendo

Naughty Dog

Bioware

SCEJ

Kojima Productions  & Naughty Dog !!!

fans of the both since i was 10 years old playing MGS & Crash Bandicoot and since then they never disappointed me!

From the East:

Nintendo EAD, Kojima Productions, Capcom, Amusment Vision, Intelligent Systems, Level-5, Atlus, Treasure

From the West:

Valve, Blizzard, Retro Studios, Epic Games, Criterion, Bioware, Naughty Dog.

1. Sega AM2 (Shenmue, Virtua Fighter, Daytona USA and many MANY more) http://en.wikipedia.org/wiki/Sega_AM2

2. Capcom (Resi, DMC, Onimusha, Street Fighter, Ghosts 'n Goblins and many MANY more)

3. Nintendo (no need to list Nintendo games, you all KNOW which are their big hitters)

Those were dark unheard of days. xD

Nintendo EAD, Retro Studios, Team Ico, and Capcom are the best of the best in my book.

IMO it is easily Nintendo EAD (Mario, Zelda, Pikmin, Mario Kart), notable mentions go to Team ICO(Shadow of the Collosseus), Level-5 (Dragon Quest VIII and IX, Inazuma Eleven, Prof Layton) and the old squaresoft (Chrono Trigger, Final Fantasy, Secret of Mana)

i like most of the dev's, even Crapcom. the only ones i dislike are Activision (For Squeezing out Customers and beeing proud of it), Obsidian (for releasing every game buggy) and maybe Namco for goddamn not squeezing out their titles. :P

my favourite 5 are 1.)Nippon Ichi 2.)Compile Heart 3.) Tri Ace 4.) Square Enix 5.)Cavia

Not entirely because of their games, but their philosophy. i am interested in learning more about Mistwalker , but i couldnt find much by now.

VanPool.

bioware