I think I met one but I'm not sure he really had SA since I didn't get the chance to know him well. I had to do field work with him a couple of times. I liked him because from my point of view he was the most kind and harmless person. Very shy guy, not very expressive, didn't talk much, but absolutely not intimidating to me. I know some people at work didn't like him because he was awkward, and he was rejected at school, but he was actually a very nice guy and I wasn't the only one who thought so. You just had to be willing to TRY and take the time to get to know him.
But most people are just not patient/interested enough for that.