So there's an interesting article on facebook post content and the Big Five. The article opens with "The things you say on Facebook apparently reveal a lot about your personality, according to a large new study in the Journal of Personality and Social Psychology that finds an association between words used in Facebook posts and personality traits."
The study built world clouds from the results for high and low end of each trait. Here's the image for introversion/extraversion:
I haven't looked at the study itself, but the word clouds are fun.
(Note to the easily offended: some of the other word clouds contain profanity, particularly those for low Agreeableness and low Conscientiousness.)