My AS boyfriend is an amazing photographer. The inability to smile on cue is not specifically an AS triat it a most people trait. Those who can do it just have a good memory for how a real smile feels. This might actually be a good "trick" for an AS person to try... having said that. Try to get people to take pictures of you actually having fun. My boyfriends photography style is journalistic... he gets posed looking pictures without posing people and everyone always raves about how no one ever gets a good smile out of them and can't figure out how he does it.