I like to play in the evening, it can take about 3-4 hours, this is usually the case. On weekends, I can go to the site during the day and spend a much larger amount of playing time, 5-6 hours, if there are no other important things to do.
Currently a maximum of 2 or 3 hours a day. Of course it depends a lot on the tournament you're playing, but I usually play a few sessions during the day.
I been playing a lot lately and i tell ya. On a good run i have played 32 hours straight online no drugs or anything. I did however have lots of monster energy drinks. but when i really go at it. i do about 8 hours to 16 hours a day.