Shenmue, Powerstone and Sonic Adventures were the only good games the dreamcast had :/
How can you not include Rez! (as I mention in pretty much every game thread on here heh).
Ikaruga was also good, if a bit hard. And Chu-Chu Rocket! I seem to remember playing Dance Dance Revolution with the dance mat a fair bit too...

Edit: and what about Jet Set Radio! There were so many good Dreamcast games

