I made a similar thread recently about my obsession with my appearance. it's quite a long thread, but there might be some answers in there for you. I am getting an official diagnosis of BDD when I see my therapist next, but there is some information in the thread on the symptoms and most common parts people with BDD obsess about-

http://forums.psychcentral.com/showthread.php?t=143188

I hope that gives you some answers or ideas, and that you can see from the comments that you aren't alone in feeling the way you do. And I'm TOTALLY feeling you with the hair.