Here's a "Belief System Selector". It asks you a number of questions and rates which belief system/religion you seem most compatible with.

Here are my top 3:

Secular Humanism (100%)
Unitarian Universalism (89%)
Atheists and Agnostics (76%)

I have to say, the description for Secular Humanism really seems to match with my beliefs. It's not a term I was very familiar with before, but while watching Bedazzled the other night (don't ask), one of the characters said, "Isn't Secular Humanism yummy?"