Depends for me, if sales and enquiries are high then I spend longer. I generally check my mail etc every hour, and if all is ok I log off! However if I am working on a project i will spend far too long.....14hrs is not unusual!
I spend 6-8 hours not more then that. If I spend more then that then my family members will be at back of me with sticks
well my time on internet sometimes too long,sometimes too short.. well i think i live a decent life to be honest.