I know Super Monkey Ball has been pretty popular on the GameCube, but I really didn't have much fun with it on the Wii. Most of the games just lasted too long and didn't necessarily use the controllers optimally.
Raving Rabbids, on the other hand, was a blast! All the games were pretty fun, and even the few weak ones were at least amusing to watch. For example, there really isn't much to jumping rope (you just shake the nunchuck to jump), but when you have rabbids popping up and screaming in an effort to distract you, you just have to laugh.
I sent Super Monkey Ball back to Gamefly on Monday. Let's see what their turn around time is. With luck, I should have a new game to try out by Friday.
In the mean time, I'll be playing Twilight Princess whenever I get a chance. I've always liked the Zelda games, and this one is proving to be pretty fun as well.
The other game I have is Trauma Center: Second Opinion, which is... interesting. The surgery bits are a little campy and the storyline is "very Japanese" (to quote Scott), but I've only played it for a little bit at the party and haven't made up my mind about it yet.