Sony then Nintendo>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Microsoft.

Why are people turning this into a sales argument?

When I play a game, I don't care how many copies it sold. It doesn't affect my experience whatsoever at all.

This thread is about the quality of the games.

You can still think Nintendo is the best but don't say it's because it sold more or because "they're the only one seemingly able to support two platforms".

You forgot Metroid Prime 3: Corruption.

As for my vote. Other: Blizzard Entertainment and Valve.

Nintendo>>>>>>>Sony>>>>>>>>>>>>>>Ms

Nintendo. 

Although Sony titles have been stellar this gen, Mario is Mario.  

Good thing no one's said that. ;)

Supporting two (or more) platforms well on the other hand...

Something else to consider, LittleBig Planet and Motorstorm were both released before their developers were bought out, ergo both games technically shouldn't be up for consideration (though MS Pacific Rift and future games from MM and Evolution should be).  Also, Halo 3 was actually completed before Bungie split from MGS, ergo it should be considered as part of Microsoft 1st party developed catalogue this gen.

Sony > Nintendo > Microsoft.

But Sony by far, I mean, really far.

http://en.wikipedia.org/wiki/Sony_Computer_Entertainment

I think Sony wins in variety.

As a Nintendo guy I gotta admit Sony as made a brilliant job this gen with 1st party. But I like Nintendo franchises the most.

Animal Crossing and Zelda > All