I haven't been diagnosed personally. One of my obsessions has always been understanding the way I think though, so when I read about aspergers I knew instantly that it fitted me.
I'm not sure whether I'd have preferred to get diagnosed so young~ not knowing forced me to fit in even If I didn't feel I fit in. It forced me to function well in society, even if I didn't really think I belonged.
More importantly, I never had medication of any type, which I'm very grateful for. I'm actually going to the doctor tomorrow to begin the process of getting a diagnosis. If any1 tries to get me on meds at any point, I'll tell them to kiss my ass.