It depends on the day, really. Like today I'll probably play a few hours being it's Christmas, but usually I'll put in anywhere from 5 to 13 hours. The latter if I run deep in a trny.
I also get some studying done as well. This game is evolving like no other, so I've been trying to keep up w/some of the new strategies and streams that seem to interest me the most, and there's a bunch out there.
Jonathan Little has some cool vids. Card Player is the only rag out there I know of, if you like old-school reading. There's some cool stuff in there. But there's all kinds of online like tools, tips, blog, vlogs, etc., to keep one busy for those moments in between sessions.