I've enjoyed a lot of games. Some of the memorable ones are:
Phantasy Star Phantasy Star Online Skies of Arcadia Shenmue series Xenosaga series Halo Dead or Alive 2 Devil May Cry 4 Star Fox 64
There are quite a few more. Maybe I'll list some more later.
Star Fox 64 was so much fun - played that a lot.
And looks like your a Dreamcast fan :D