How? Well, that's easy. Just go the PhilosophicalPersonality website (http://www.philosophicalpersonality.com/), and take a free, entirely anonymous personality test, while answering a few questions. It's fun and takes only 5 minutes.
Could it be that people are attracted to different philosophical views because of their temperament? Could it be, for instance, that extroverts tend to be materialists, while people who are open to new experiences tend to deny the reality of free will?