Midgets. Every since I saw Austin Powers, I'm afraid of somethin' biting my ankles.
No, seriously...poor hygiene. Can't go a day without washing my hair. And lately, my fear of people has grown progressively. I can't stand being in public.
Commitment. I always have this fear that when I commit to something, it's going to come back and bite me in the ass... bleh... It has a couple of times.