I haven't played a lot of each title long since I've been trying each one, but SD Gundam (JPN) is pretty fun. Warioware is cool but it gets old fast. Cooking Mama (JPN) is also fun.
Rayman, Wii Sports, and Excite Truck are awesome games....I didn't care for Zelda that much....Ive got Sonic too but have got much time into it....BTW has anyone played sonic alot and could tell me it the game gets better after the confusing and unorganized 'training'. becasue as of right now i have probably 60 mins into it and have played only a total of 5-10 mins. damn there are some long boring cut scenes and what not.... but ya bassicallly hoping on the gameplay to pickup!
Madden for multiplayer...I like its inovative controls. I play much better now than I ever did with dual analog!
Trauma Center is pretty cool too, though I find myself in want of a turbo switch for the A button during the dialog.