Whenever i'm on a computer at home i always have PC open up some how.
But depending on how long i'm on a computer i can be on between 1-god know how many hours xD
I don't even bother counting.
Sometimes I open PC, look through my favourite subforums, don't find any particularly interesting new threads and leave after maybe 5 minutes. Other days I spend probably something like 6 hours on PC.
Too much. As soon as I come back from school, I'm on PC. When I wake up in the morning, I'm on PC. I come on on Christmas, Birthdays, literally, I'm always on. Even when I should be studying >_<
A few hours :) Especially later at night when everything around here shuts down and I gotta kick it at home, I also sign on between my classes. I'll be on more now THAT IT'S SUMMMMERRRRRRR!