Sometimes I find myself going through all of my wall posts and pictures on my Facebook. I'm curious to determine how people perceive me and whether my Facebook reflects me in a positive manner. And while I'm at it, is it bad that nobody comments on my profile pictures? I don't comment on photos unless there is some sort of significance or meaning to them but some people get comments on their profile pictures about how cute they are and what not (even if they don't look cute).

Listen kid, if you like Facebook, don't take this too harsh. But you shouldn't care if "whether your Facebook reflects you in a positive manner" (as you put it), as long as you reflect yourself in a positive manner outside of Facebook.
Facebook, and a lot of other websites, have just become excuses for not being a decent person and meet people face to face. At least that is my opinion.
And now I've properly written something so long, nobody bothers to read it -.-