Well, I'm neurotic as fuck, and I'm also waaaaaaay to honest for my own good, so asking me what's wrong with me is likely to turn into a bloody long therapy session.
For starters: I'm overly analytical; I derive stories out of everything and compulsively write about them even though nobody will ever read the shit I write; I have all these OCD habits that I can't do crap about; I empathise with fictional characters more strongly than I do with myself; I have serious self-esteem issues; I don't see anything weird about the fact that my first girlfriend was a bi-polar former prostitute who'd been pregnant twice, nor the fact that I knew all that before we got together; I seem to think and experience emotions differently from conventional people (for all I know, that could just be a side-effect of insomnia and ADD medication); I have two distinctly different personalities; and I strongly suspect that I do (or will) suffer from some kind of mental illness, but then that could just be paranoia...
But despite all of that I'm still the stablest person I know.
It feels good getting stuff like this off my chest. =3 This is why I love the internet. So liberating.