Addiction to computer games...

[HamburgerBoy]

Games can't exactly affect your life if you don't have one, can they? My life IS computer games, so I voted no.

 

[Taggart]

Age of Empires pretty much caused me to get a 2.7 first quarter freshman year of college. Fall '98.

 

[Cheezeit]

im hooked on bf2 now, but never have i gotten any less than a 4.0 gpa for any reason

 

[Waylay00]

BF1942 was the first real computer game that I played that addicted me. It cut into my school work a little, but hey, I was still valedictorian.

 

[Staples]

Probably but my 6 year addiction to forums has done much worse damage.

 

[Whitecloak]

I have stopped playing like I used to due to carpal tunnel.

 

[Mr Smiley]

Yep, Diablo 2 was a b!tch. I didn't sleep, eat or crap in a bathroom for months...

 

[jamesbond007]

Counter-Strike and Quake 3. I would be late for work way too many times because I'd be up until 3 or 4AM and my shift started at 6am. Ah, so much fun to be had!

 

[yllus]

MUDs (that is, text-only RPGs) back in the very early years of junior high/high school.

 

[Chronoshock]

Hmm yes.
Diablo 2, WoW, Counterstrike, NWN all qualify.