Counterstrike, and starcraft.
Counterstrike damn near got me divorced back in the 0.52 days. I'd go for 24 hour stretches playing it, was part of a clan, etc. Bad scene... It's a minor miracle that I was able to do all that AND still get work done AND still keep my wife from bailing, cuz I can't figure out how I pulled it off now.
I have starcraft on my laptop. It's showing its age these days but it's great for killing time when flights are delayed or when whiling away the hours in the air (when not sleeping, that is).
