I'll be different.

DRAGON BALL Z: BUDOKAI TENKAICHI 2. I loved this game to death, and I played it longer than I played Zelda. I even stopped playing Zelda a few times because I wanted to play DBZ.

Actually, scratch that. BUDOKAI TENKAICHI 3 is coming out in November, and it looks like it improves on the first Wii game. Besides having *more* characters (2 already had over 120 characters--even alternate forms of the same character had different movesets), the Wii version will have ONLINE MULTIPLAYER.

Also, the Wii gameplay has been changed for the better. In Tenkaichi 2, your special moves were mostly based on a cursor on the screen, and where you moved it on-and-off the screen. Now this could get a little awkward, because you'd constantly have to have your wii remote pointing at the screen in order to fight normally (if you had the cursor off-screen in a particular direction you'd be in a blocking stance). In Tenkaichi 3, all of the special moves are entirely gesture based, eliminating this problem.

There are other gameplay additions that apply to both the PS2 and Wii versions as well, such as additional movement types and counters. The Wii version is definitely the one to get. It takes a while to learn, but once you adjust to the controls it's much MUCH more dynamic than using a traditional pad. Doing a Kamehameha by holding B+Z and doing the kamehamotion is a lot more visceral and satisfying to me than pressing two triggers and a face button. You can still use a Gamecube/classic controller if you really want to. And the Wii version is online.
--------------------
But yeah, that's November. Save up for that one! Zelda should really be a no-brainer, which is why I went with something different.

Extra note, WarioWare>>>>>Mario Party.