Hmmm... My list would be very different to yours, oh the glory of opinions!

That being said a few of yours would appear (Bioware, 2K)

LOL, opinions are truly glorious, what would your list look like?

Amazing how only realistic graphics make the top ten - not only yours, but preety much all top ten out there.

1 - Nintendo (lots of games)
2 - Capcom (Phoenix Wright, Zack and Wiki, SFVI, Tatsunoko Vs Capcom, Megaman, etc)
3 - Sega (Bayonetta)
4 - Rare (All their games, except Perfect Dark were good)
5 - Dice (i really liked Mirror's Edge)
6 - Ubisoft (No more heroes)

Hmm, that's it for me.

In no specific order I'd say Bioware, Naughty Dog, Bungie, Valve, Bethesda, Team Ninja, Epic Games, Insomniac, Gearbox Software, and Nintendo.

I'd also say Indie developers are doing a great job this generation.

1. Nintendo

They can't stop to blow me away can they?

2. Square Enix

They make awesome, polished games (when they feel like doing them)

3. Capcom

They can make awesome games

4. Konami

Awesome games

Special mention to some sony devs since I do respect thei job

just a question aren't some of those not developers?

2k games, R* Games, Ubisoft, Konami

 aren't they PUBLISHERS?

I don't think a studio deserves to be on that list, when they only made one outstanding game.

Ubisoft Montreal (Assassin's Creed, Assassin's Creed 2, R6 Vegas, R6 Vegas 2, Splinter Cell Conviction)
Bethesda (Oblivion, Fallout 3)
Infinity Ward (COD2, CoD4MW, CoDMW2)
Bioware (Mass Effect, Mass Effect 2, Dragon Age)
Bungie (Halo 3, Halo 3 ODST, Halo Reach)
Epic Games (Gears of War, Gears of War 2, Unreal Tournament 3)
Capcom (Resident Evil 5, Street Fighter 4, Dead Rising, Tatsunoko vs. Capcom, Monster Hunter Tri)
Valve (HL2 EP1/EP2, Portal, Team Fortress 2, Left 4 Dead, Left 4 Dead 2)
Nintendo EAD Tokyo (SMG, SMG2)
Insomniac (Resistance, Resistance 2, Ratchet & Clank Tools of Destruction, Ratchet & Clank A Crack in Time)

No real order here. They are pretty much equally great.

Naughty Dog
Zipper
Dice
Quantic Dream
Guerrilla Games


Top 5 no order.

Hmmm Konami Really?

In terms of success and stature, Bungie, Naughty Dog, Bioware and Epic deserve the 4 top spots. Whichever order is either opinion or Fanboy opinion. I'll post my official top 10 later.

I hate it when people compare development houses to development studios. It should be Ubisoft vs Konami vs SCE or Ubisoft Montreal vs Kojima Productions vs Naughty Dog. Not a mix between the two.

And they completely ignored Nintendo's EAD groups.