I checked 80+, but it depends on how you define work. A lot of work is sitting around in an all-night diner drinking coffee and drawing on napkins. It ain't such a bad thing, and is probably less stressful than playing a first person shooter.
Agreed, it depends on how you define work. I spend most of my waking hours in front of a computer, and a lot of that is building something - though it may not always be paying client work. I really have no idea how many hours I "work".