The Belief System Selector is a quiz that tells you what religion you are, or ought to be, from your answers. In my experience, people don't choose a religion based on their beliefs, but rather the reverse. They identify with a religion out of respect for momma and poppa and all their ancestors, too. Still, it's fun to see how it comes out - it pegs me as a Unitarian, which is not too far off. (Tip of the hat to Identity for this link.)