Bought a Dreamcast shortly after launch, had a wonderful time with it while it lasted. Innovative games like Seaman, Samba, Chu Chu and PSO. Amazing stuff at the time. The poor little console was being pushed to its limits by a lot of games though. When Xbox and PS2 came out, it was time to move on.
Star Trek: Klingon
Not necessarily the best game, but it demands to be on the list.