I would love to play Crazy Taxi and Sonic Adventures again. I used to have them along with that Bass fishing game. I never ever ever ever want to fish in a video game again.
I remember playing this one game on Dreamcast. I forget its name, but it was about evolution. You'd go around killing things then eating them. You'd gain points I believe and go to a DNA upgrader type deal. You'd punch in a code on a grid using colors and it would give you new parts. You could put these new parts on your character (Dragon legs, mantis head, human arms etc. etc.) I never got through the whole game but I heard a rumor that if you got every human part, you got some special attack or some-such and essentially became a god.
EDIT: Yea, I want that game.