Beliefnet is a great website and their quizzes are a great source of entertainment if you're bored and wondering about the meaning of life, the universe, and everything (...42). Perhaps the best one is the Belief-o-matic:
Even if YOU don't know what faith you are, Belief-O-Matic™ knows. Answer 20 questions about your concept of God, the afterlife, human nature, and more, and Belief-O-Matic™ will tell you what religion (if any) you practice...or ought to consider practicing.
You just answer a round of questions and based on that they determine which faith tradition most closely fits your beliefs. You might be surprised at the results. (I won't tell you how I rated, but I doubt it would come as a shock to those who know me that the Quakers and I would get along just fine.)