[DuFresne]

Do you already have a gamecube? If not, then don't forget that getting a wii will open you up to those games, too.

I don't know if you're a Zelda kind of guy, but that's a good a wii game. Or you could get the gamecube version if swinging your remote around isn't your thing.

Trauma Center is a very decent game, but it does scream "THIS IS A HARDWARE DEMO" which I know might deter you. You don't seem to be looking for those kinds of games.

Avoiding first person shooters until Metroid Prime 3 might be good idea. Nintendo's been good about making games work with their controller, so hopefully they'll be the first to make a non-sucky wii FPS.