LBP and NSMBWii, both are great.
LBP: I like to play Online on different fanmade levels ;o) The graphics & musics are great. There's one problem, the gameplay, sometimes, it's really good made, sometimes, you jump and jump but without success.
NSMBWii: If they could add a little bit of history, it could be better but the game is really fun. I love it.