A few times a week. It may turn into every day for a week or so too. I usually play role-playing games or real-time/turn-based strategy games. I am currently playing Diablo II - infact, have been playing this game since 2002 or something. Some of my other favourites have been Age of Empires (II and III) and Civilization III.

I remember back in college, we used to play Civ III till 3 am, go to sleep with our alarms set for 6:30 am, wake up and get playing again!! And we used to attend our classes at 8:30 am too!

--Edit
BTW Per, I would say that a computer game is also a video game, but not the kind that comes bundled along with the OS (no Solitaire, for instance).