I had a reply from Aoch re faces, and just tought I would answer as a new post.
I have difficulty with faces. One of my kids had a friend whose mother, I was totally unable to recognise. To make matters worse, my husband played squash against her. I never recognise her in the street, and I have heard that she thinks me incredably rude. Some faces are easier to remember than others. This problem can affect me when watching tv. Sometimes, I have difficulty disdinguishing characters in a program. I have to ask other people which person is on screen at the moment. I just give up on programs like that, too much like hard work.
I have read that some asd people have prognoposia (something like that). I think I may have a mild problem with that. I am realising that these things are more subtle than the books suggest.
I wonder if this affects our ability to read faces. Some are perhaps more readable than others.