Surely there's already been a discussion of this in some thread somewhere, but here goes...

My mom and brother bestowed a sweet, sweet score upon me on Saturday by giving me a Wii for my birthday. I am already loving the system (loved it even before I had one), but I don't know a dadgum thing about video games. I rented Super Mario Galaxy today, and have really enjoyed it (for an embarrassing amount of time). I'm definitely getting Mario Kart as soon as possible, and I'm highly intrigued by Super Smash Bros. But I'm also curious about some other titles like Teenage Mutant Ninja Turtles, the Marvel Alliance game, etc.
Thoughts? Suggestions?