Normal these days fits in the same category as Common Sense: the mythical cabinet. There you can also find truthful and consistent politicians, Duke Nukem Forever, the Ultimate Question, etc.
Normal is boring anyway. Embrace what makes you different, it lends to your individuality, and people too stuckup to like that in you can stick their nose in a beehive.
As for the disorders that set you apart, OCD, Parkinson's, Schizophrenia, and others: they are tough to deal with, but life isn't meant to be easy. Plenty of people in high profile careers (I think you can name a handful, and even be surprised at ones that do carry a burden yet keep it out of the papers) carry on with what they enjoy doing. When you don't let it stop you, that makes you the stronger person than someone who's more concerned about you not being "normal."