mike-
congrats! The most important thing that college teaches you is HOW to think. Given what you said about your interests, I recommend psychology. Of all the college classes I have taken (including grad school), the two classes I learned the most in were "Human Perception" and "Intro Psych." The unit on High Control groups hit close to home.
As what to avoid, I agree with Woody Allen: "Stay away from any class with Beowolf in the title."
good luck.
uncy