Talk about how AS and social introversion runs in your bloodline.
My grandfather was an engineer. Apparently, this is one of the fields that are most noted for being associated with Asperger Syndrome. He did demostrate a lot of its traits, and, even in his Army days, he worked a job that had him off on his own most of the time. I don't know either way whether this necessarily indicates that he had AS, but he had a lot of the traits from what I remember of him.
In my mother's side of the family, I have a great-uncle who is definitely schizoid. He really prefers to spend most of his days sitting in his little chair, staring off into deep space without really taking much in about the world around him. He used to work with IBM, back in the days that it was still an emerging company, and he's even got a pressure clock on his counter that he was given as a gift for twenty years of loyalty to the company. Furthermore, the Parkers have always been considered weird on some level, which is in no small part due to them being horrid packrats. Not so much AS as simply having schizotypal personalities, but it's relevant enough to warrent mention.
My father's line is mostly foresters. They've always preferred to spend extensive time alone, out in the woods. They have their social side, but they've always tended to have a fetish for going off on their own out into the woods, just spending time on their own. I guess they just get a kick out of just wandering about on foot. They never really kept in contact with one another much, save through written letters. This is more on his mother's side, really. My old man carries this on by working as a land surveyor. He calls himself a redneck, but he's really more of a red-necked hippie, whether he knows it or not. The only reason he doesn't grow his hair out is that his friends thought it made him look like a girl.
There's probably more, but what about you? What in your line may be responsible for who you are?