A while back, I came up with the 8 Gamer Alignments to articulate 8 common approaches to playing Our Favorite Pastime. Like the classic D&D alignment chart, It has two opposing axes, but in this case: dickhead-reasonable and actor-gamer. You can be, for example, a Reasonable Actor, or a True Dickhead, or a Dickhead Gamer. But you can't be an Actor-Gamer or a Reasonable-Dickhead. You get the idea.
My current game group includes two True Actors, two Reasonable Gamers, and one True Gamer. I simply can't play with anyone on the Dickhead side of the wheel, although I understand that for some gamers, that is gaming. How about you?
Bonus: the 8 GM Alignments, where the axes are judge-fudge and rat bastard-enabler.