Shit, I'm not even sure where to start...
Conker's BFD(Great Mighty Poo!
[typical, I know, but I never laughed harder than when he first bellowed out "Bring me some sweet corn!"])
Chrono Trigger
Contra
Kingdom Hearts
NBA 2K2
RIVER CITY RANSOM!
Super Mario 3
Majora's Mask
Soul Calibur(made me proud to have bought a Dreamcast the first day just to rub it in the faces of all the "Fuck that, I'm waiting for PS2" assholes)
Metroid Prime
Project Gotham Racing
SotN
There's a bunch of others that I'm undoubtedly forgetting, but I leave you with, in my opinion, THE BEST GAME EVER(caps to add emphasis)...
Super Dodge Ball, a game that I still play regularly, after 14 years.