Great question, Patel. I have met a few genuinely autistic people in person, but most of the average message-board types who I have met (who may claim they have autism/asperger's) are just extremely socially awkward. Autism is still not understood very well, we have no idea of the causes (mercury poisoning?), and its probably frequently misdiagnosed.
One thing I have run into a lot in my time on this planet is obsessive-compulsive people, from the slightly obsessive to those requiring meds to control it. I'll consider myself on the lighter side of that scale.