If you're like most gamers, you probably lean and jerk the controller with your old consoles while playing racing games, even though the movements have no effect on the game itself. Well, now they do. And it's fun. But give Excite Truck a spin and then try going back to playing a regular analog stick game. You'll probably find it's just not the same anymore.
Remove the Excite Truck reference & insert Super Monkey Ball: Banana Blitz & you get the jist of everything I've been saying about the game.
I'm actually scared to go back to the original or second game at this point... It's a good thing I don't have my own Wavebird, & no longer have access to a GCN to play the games. Yet.
Though I must say I've never been the kind of person to lean when I make a mistake & want to fix it. It was just an instinct relative to playing a Wii game since I tend to (intentionally - I just like looking silly & having too much fun with these types of things - & Wii really is the BEST novelty item in the world right now) exaggerate all my motions, especially in Wii Sports. But anyway, I jumped off a cliff & tried to lean to make my monkey come back after such a huge mistake when lo & behold he did! =P
Trauma Center: Second Opinion is even crazier in that regard. It's completely direct control.