10. you just bought an awesome new computer with the fastest video card available just to make your Armagetron run better.
9. you've played under more nicknames than there are people in the ____ clan.
8. you consider anyone with less than 150 match wins on Armagoshdarn a n00b.
7. you correct people when they talk about N64s (instead of N54).
6. while you're watching the movie Tron, you complain about the light cycle scene being done "all wrong".
5. you find yourself grinding your car against the curb in a vain attempt to gain speed.
4. somebody asks you what your favorite FPS is, and you say "I don't know, but the higher the better!"
3. you get into a car accident because "it's lame to use brakes" (i.e. on Armagoshdarn).
2. you're having a lousy day at work/school, and you start blaming everything on lag.
and finally...
1. you start to wonder if becoming a communist will make you a better player.
It's silly, I know

(please feel free to add to this list)