Well, at least in my case, my day job is spent in front of a computer at work, so that's 8-9 hours right there. Then, typically another 2-3 hours hanging out on the computer at night after dinner, before bed.
Same. At least 8 hours at work (usually around 10) then whatever time is left until 1am at home. I have activity days though where I will not go home but instead play Badminton or go Ice Skating or just visit friends.
As much as I love what I do, I like to unlock the chains every now and again ;)
I've been playing Diablo since it was first released Dec 31, 1996. You can download a free version to see if you like it before paying $60 for the full version. It's a role playing game very similar to Dungeons and Dragons -- kill the monster and grab the treasure. If you are looking to see blood and guts you will be disappointed, when you kill the monster(s) they just disappear.
It really depends on what I am doing. If I just check my email and facebook, it can go from 3-4 hours. If I were playing an online game such as ArcheAge and it were addicting, it would balloon to 6-8 hours.