I have 2 Games:

MLB- Padres vs. Yankees- Game 3 of the 1998 World Series. The Padres blew a 4-2 lead in the 8th inning when Scott Brosius hit home run off closer Trevor Hoffman and went on to lose 5-4. A great game nontheless; that was the first and only World Series game I've attended. Seeing the Padres get swept just broke my heart at the time.

NFL- This year I went to Qualcomm Stadium to watch the Chargers play the Packers. I finally got to watch Brett Favre play in person. Favre did not disappoint, throwing for 278 yards and 4 touchdowns as the Pack beat the Chargers 38-21. Just a wonderful game.