Firing up the Dreamcast for the first time with the gloriousness that was Sonic Adventure. I was completely blown away by how amazing the graphics and gameplay was. I played that game until my eyes burned. Also on the Dreamcast, playing Resident Evil: Code Veronica was amazing. Graphics, story, many memorable scenes in that game. To this day I maintain that that is the best Resident Evil game.
I fired up my dreamcast and played a game called Blue Stinger......Which gave me motion sickness and I threw up all over myself and the controller before I noticed I had motion sickness.
Then I was like maybe its just that game and picked up Sonic Adventure and an hour later had a repeat spew.
These turned out to be the only games that made me sick and as luck would have it were my first 2 games. But once Phantasy Star Online came out I almost dropped out of college and by dropped I mean Kicked.