No, in fact, I always make the funniest or most horrible face I possibly can.
Somewhat, I guess--I always make an effort to look my best, if that's what you mean!
Yes, I have a repetoire of tried-and-true faces and positions that I've practiced and perfected in front of the mirror. Nothing is worse than a bad shot of you on the internet!
No, I try to stay out of pictures. I'm not that photogenic.