Go read the Republican Bush/Rove platform. Think about it in relation to your political views. How close a match is it? How much do you agree with, and how much do you disagree with?
Now go read the Democrat Kerry/Edwards platform. Think about it in relation to your political views. How close a match is it? How much do you agree with, and how much do you disagree with?
Now go read this.
Discuss. There is no quiz, but there will be a final in November.
Re: Another thought experiment
I'll note here that one causes the other. So long as the American national voting system is a winner take all system, we will only have "best" and "second best" have any significance. "Third best" will be a distant third, at best. (Sorry, had to.) This won't change unless the US changes to a Parliamentary type voting system.
So, to apply what I said in my second link above, and, of course, in my opinion, you'd be much better off giving the Libertarian party your time and money, than you would in giving them your vote. If they truly have the right ideas (and I like some of them), then more voters need to be exposed to those ideas. That can't happen without resources.
And, if their ideas do become popular, look to the dems or the reps adopting them. They're not stupid; they know not to come in third.