2. Diablo 1's good 'ol Butcher line.
3. Battlefield Bad Co. 2. Every online match in that game was filled to the brim with awesome moments.
4. Beating a frustrating character and preforming a glorious fatality on him in any MK.
5. First playing L4D with my friends. We had no idea what it was about going in, so screaming at all the zombies and laughing at all the Boomers was so great.