Well that's enough proof for me. Nintendo Fan lists 3 games, all Nintendo games, so I come to the conclusion that Nintendo fans only buy Nintendo games.
As for my favorite games:
DS: Pokemon (haven't played Phantom Hourglass yet, nor Advance Wars, both of which could take this spot)
PC: Battle for Middle Earth II or Medieval II: Total War
Wii: Right now it's probably Lego Star Wars, but it's a 3 way tie between that, SMG and Zack and Wiki
Edit: I didn't really say why. Basically they're just fun games, and that can be played with friends. Multiplayer is a big plus for me. That's why Lego Star Wars beats SMG and Z&W since Lego Star Wars has a better co-op.







