I'll be in a series for three or four episodes, but then I'll be off the series, and downtime, as an actor, is a little more than most people understand. Most of the time you're just sitting around taking coffee with friends.
I think the whole definition of a geek is somebody being passionate and focused, and being proud of saying that they're passionate and focused, on a narrow range of subjects.
When I carve out time to game, it's because I rationalize that I 'deserve it,' so I relish every minute of that 2-3 hour session.
Every single job is a challenge. You are walking into a new set, a new character, creating a world and trying to get comfortable to do your best work.