2D Mario.
Multiplayer is my thing. Without it, the two Mario's are about tied, but with it, the choice is easy.
Since I can't see a 3D Mario implementing local multiplayer as well as NSMB Wii, I don't see that ever changing.
I do prefer much of the music in Galaxy, though. While I loved most of the NSMB Wii music, I wish they ditched the old NSMB theme for something new. I mean, most of the Galaxy music was new, wasn't it? Though, I'd really love to play an epic final dungeon with the "Bowser's road" theme from Super Mario 64.







