It might be hereditary. There are a number of studies trying to figure out what causes it. Interest in mathematics, was only one thing I became obsessed in, music was the first, I became an accomplished piano player. I have since given it up, but I took a strong interest in chess, which has been a more recent obsession. I became successful in these area's, probably because of aspergers.
I have a friend whose son has Aspergers, who composes his own music. He writes about 30 seconds of music then stops. When a tune comes into his head goes to his room, to play his music. Problem is he does not connect the tracks together to form anything longer, which is disappointing as he is good. He is also interested in Chess, and has tried repeatedly to beat me.
He lives with his mum, who suspects he got the Aspergers from her, as she is also a bit of a character, ie a bit strange, which makes her interesting. She has a Phd in biology, and is chaotic in her thought processes. She is also an extreme techno geek and can can obsess on a subject for a while then switch to another. Her house is full of gizzmos, which have overflowed. She is not able to throw anything out. She refused to use windows computers insisting the rest of the world was wrong, until the last couple of years when she has been forced over due to work and her other obsessions.
I think we all know you a bit better now, are you diagnosed Aspergers by a doctor or is it a self diagnostic?