All my life, I've driven my parents nuts over my refusal to be in photos. I'm just not comfortable posing and smiling and I always feel so stiff and awkward.
I'll usually give into a few group pics at a family event, but otherwise refuse to play along with that nonsense.
It's even worse on trips, where I'm trying to take photos of the cool places I'm seeing and they're complaining that I'm not in any of them.