You know you play Minecraft too much if you try to reach the high area by putting blocks of dirt instead of searching for ledder.
You know you play Spore too much if you don't find an upgrade by killing the strongest animal in the pack.
You know you play Skyrim too much if you think when you're searching something in your bag, the time stops.
You play Assassins Creed too much if you start crawling up your house wall to reach your flat.
You know you play The I of the Dragon too much if you wonder you can't build a town in one click.