Well, I only know a couple of people on the autistic spectrum, but most are family members and I've lived with one all my life (my sister). I'd say she fits to a decent degree into your description. She tends to be somewhat monotone unless speaking emphatically about something, and although she speaks very well; she still stutters a bit, uses a lot of 'um's', and tends to lose her ability to put together a cohesive sentence when under pressure.

Personality-wise, she can be funny but still very abrasive. She's never had a boyfriend or shown much interest in men (although I can tell she's somewhat interested in the idea). She's also very unforgiving and highly critical of others - a major perfectionist who wants to do it all and will hold a grudge for years. Heh, to some degree she identifies with reptiles. She doesn't show much emotion, although she will laugh when playing with us, and I've seen her cry without actually making noise before. She really tends to pull back when feeling negative.

Right now she's in college going for a physics degree, and is doing very well. She has a major urge to be independent, but at the same time can be very demanding of others when she needs something. She has trouble considering others' feelings. We've also noticed some real obsessive-compulsive tendencies, and a lot of things need to be 'just so' or she gets upset (not expressively, but we still know and she doesn't let us live it down).

My cousin, on the other hand, is a male with Aspergers. He almost refuses to go out into social situations, but the few times I have seen him out, he has been very expressive and seemed to do quite well in certain respects. He often looked actively excited. The problem was that he seemed to have no sense of social etiquette. A lot of the things he was emphatically expressing were strange concepts and the fervor in which he proclaimed them would likely seem off-putting to others. His mother is agoraphobic, so that probably doesn't help his ability to get out and socialize. Last time we went to visit, he had to sit in the car for almost an hour before he got up the nerve to come into the family reunion and see us.

Also, this is probably partially the difference between autism and aspergers, but I noticed the difference in their personalities as small children. As a young child, my sister didn't speak or even make eye contact. She often withdrew. My cousin, on the other hand, was actively involved and playing with us as a toddler. So I can definitely see the males as being more expressive.

Oh, my boyfriend also has a cousin with autism (although much lower functioning). His cousin was very interactive as well, but would throw tantrums and hurt people when frustrated/upset. Unfortunately, he barely speaks and they are having a difficult time working with him since he's now almost full grown and pretty strong.