The time I spend on it varies depending on what I'm doing, if I'm trying to buy or sell something then maybe an hour and a half. If I'm just browsing maybe 30 min
I spend a minimum of 30 minutes but up towards 5 hours most days at the moment while Im on my summer holidays. Also like Ryan this is just one of the tabs I have open usually. I check any threads I posted on recently for replies or any of my own threads then just check for new posts then reply to some then check again and repeat that till I find something better to do
Now I have realize that I spend pretty much all day. Well since most of my friends are in summer school. But when that ends maybe I won't be on that much.