Every test or quiz I've ever taken has told me I'm a Libertarian. I've read up on the Libertarian philosophy, and I have to say I agree with it a great deal.
An example, albeit funny:
You Should Vote for Michael Badnarik
Two Points. Your Libertarian Vote Just Landed in the Trash Can!
Which presidential candidate should you vote for? Here, too:
World's Smallest Political Quiz.
And my results.