I played so much Counter Strike and I wish I could have had the sense to spend that time in better ways, such as studying, socializing, or working. In the end, after 2700 hours, the only reward I got back from this game was to learn that my reaction time is painfully mediocre and that no matter how much deathmatch I practiced, some 15 year old kid with teenager reflexes will fly out of a smoke, run through a molly and 1 tap me with an SG while running.

Edit: I've now played over 3400 hours of counter strike and I regret it

EDIT: Now after over 3k hours my answer has not changed. My old man reaction times are slower and now 12 year olds are destroying me