Need For Speed Hot Pursuit 2, because Guitar Hero hurts my wrist playing anything on Expert, and I play a real guitar. Oblivion was too plain for me.
I'll take dodging helicopters over trying to play a song I can play in real life on a tiny plastic instrument any time. Any other Need For Speed game anywhere fails in comparison to Hot Pursuit 2, so if you've only played Underground or Carbon then you don't know what you missed.