my favourite devs in no order are:

Polyphony

London Studios (WipEout)

Namco Bandai

Microsoft (not console games but AOE etc)

Team ICO

EA (some EA games are very good)

Nintendo (but not the ones who do anything with Mario, because the Mario games all seem to be the same, meaning the developers must be asleep or something, although the touch one on the DS was good-sorry to anyone that's offended by that, but it's only my opinion)

And if it's Lucas Arts that does Starwars Battlefront then they're also good

Westwood 

 Uh, Jedi Knight 2 and 3 anyone?

And their currently upcoming Force Unleashed looks promising.  LucasArts gets props from me for pushing technology and gameplay ideas.

Mario games are all the same?  Super Mario 64, Super Mario Sunshine, Super Mario galaxy... k, if you say so.

Top Teir Nintendo(and their suppordinate developers) Rare Second Sega(they have been suck, so I bumped them down) Square-Enix(whoring out FF, so again, bump down) Third Capcom Blizzard Not a large list I know.

nintendo and all the second parties, capcom, rockstar, real time worlds (the fathers of gta), microsoft game studios (they give to the 3rd developers the tools, people and great support to help the projects), polyphony, sega and EA (i like the sports and the other games have some quality), maybe valve too.

well is his opinion, for me the mario games are different games too, but the crap of some people is the treasure for others, and the treasure of some people is the crap for others, for example for many people guitar hero is a great game , and for me is a crap game, but is only my opinion.

To everyone who likes Naughty Dog: What do you guys think about Crash Bandicoot?

Who dares take the name of Guitar Hero in vain??

And I couldn't care less about Crash Bandicoot.

I dare take the name of Guitar Hero in vain!

LucasArts developed JK in 1997. That was a good game.

Raven developed JK2 and 3 and both were also good games.

Like I said, LucasArts hasn't made a game worth a damn in ten years. Force Unleashed looks interesting but I lost faith in LucasArts as a developer years ago. They're the American equivalent of Team Sonic.