Before anyone brings it up. Yes I've got back in touch with friends. Yes I'm working out. Yes I've been reading. So after all that, what game should it be? I like all types of games. I have a 360, PS3, Wii U and a mediocre PC. P.S. If you have a problem go ahead and get yourself some help, you'll be glad you did.
Minecraft is fantastic. Against what others say, I enjoy the new updates and they just keep on comin'. It's a nice relaxing game to kick back on. I would recommend it for PC of course.
If you haven't touched any of the Batman trilogy games, you should really give them a try. I recently started them and I love them.
I've been saying Holy Shit while playing Fez all week. I got a fairly shitty laptop with a processor that is below the minimum specs but it runs fine.
I'll also second Minecraft. It's a good game for binge playing. I typically play it for 4 or 5 days then set it aside for a couple months. Then a big update will hit and I'll jump right back in for another 4 or 5 day binge. I've been playing it for like 3 years now but it still feels new.