What makes your life worth living, and which of these do you hide from others?

I was wondering what other people live for? Work, sport, religion, forums, sex, drugs, family, porn, TV etc and of these things, which ones gave you great cause for delight because you kept them private, and which ones you are obliged to keep private due to social stigma.

Learning and growing seems to be a natural high for me. I get a little squirt of endorphins when I shock a believer. This just happened today with my older daughter. It was quite a buzz. She asked me who the men were on bicycles dressed in a shirt and tie. I told her they were Mormons proselytizing their beliefs to others. She lowered the car window and shouted, "GO TO COLLEGE, GET LAID! THIS IS THE AMERICA." Not exactly the response I was looking for, but it works... and squirts.