Have you ever read any of the personal ads online?
I read one the other night and under hobbies/activities, some chick wrote...skiing, reading, and people watching. Excuse me, but people watching is not an activity anymore than blinking is. Otherwise, you could put anything down and it makes you sound busy and interesting.
"Well, I really like to breathe. That's incredibly rewarding. Staring into a corner? I can do that for hours. But when I have lots of time to myself, I like to grow my toenails."