[Chojin]

The Wii actually has a lot of good games, in my opinion. My favorites for the system are:

Super Paper Mario
Tony Hawk's Downhill Jam (this is not a traditional tony hawk game)
Mario Party 8 (best in the series)
Sonic and the Secret Rings

And other games that are still pretty good:

Dragonball Z Budokai Tenkaichi 2 (a good game in spite of the dbz license)
Bust-A-Move Bash! (controls are PERFECT)
Trauma Center: Second Opinion (controls are PERFECT)
Elebits (fun with gravity)
Kororinpa: Marble Mania (Marble Madness on Wii)
Legend of Zelda: Twilight Princess (if you're into that sort of thing)
Metal Slug Anthology (great games wrapped up in a shitty package)
Rayman: Raving Rabbids (some fun games, mostly good for big parties)
Redsteel (a lot of fun if you can stand the controls, also fun multi)
Warioware: Smooth Moves (also a big party game, not really worth it if you only have 1-2 regular players)