How do you know what you're political party you fit under?

My 2 cents, research, research, and research.

Don't let anyone tell you that you are wrong for your beliefs.

And follow your heart, deep down inside you know what is right and wrong to you.

I always find that it is disliking the politics of one major party that drives you to pick the other one. Otherwise we all like to stay independent and decide on things in a more sane manner, issue by issue. We live in a country where public discussion about politics (say at a bar or a party, I am referring to social setting here) is frowned upon. Stating and debating you opinion is a great way to find where you stand and if you choose a label this is one way to find one.