Do you consider yourself Libertarian? Since I moved to the South I've met a bunch of people who do. My guess is that many of them are too rational and/or secular to be Republican. But since they grew up in places where "Democrat" equals "pussy" and "spineless" they can't be Democrats either. So by the time-honored process of elimination they are Libertarian.
But what does that mean, exactly? Here's a purity test where you can find out. (Hat tip: Drezner.)