We have often been told how photogenic our son is, enough so that I don't think it is the normal "what a cute kid" background noise. I have looked at the pictures and come to realize that the reason he photographs so well is that his expressions are real.
Much like an animal, Jesse has no artifice to his expression. What you see is what you get. He has no concept of faking a smile because thats what we have asked for. There are alot of challenges with autism but I really like that I know exactly what he is feeling just by looking.