No pictures, please.
It depends on who wants to take the picture, whom I am with, where I am, my mood, whether I am asked to be photographed, and the phase of the moon.
I couldn’t care less. You want a picture of me? Knock yourself out. Literally. Figuratively. Whatever.
Sure, I don’t photograph well, but I’ve come to the conclusion that unless you’re being photographed by a top of the line photographer with the best possible lighting and make-up, and you happen to resemble a supermodel, then everyone photographs poorly.
So go ahead. Follow me around snapping pictures. I’ll just pretend that you’re the National Enquirer, and I’m famous. 
I don’t like people taking pictures of me without permission. I don’t like people listening in on my conversations. I don’t like people reading over my shoulder.
These all seem somehow related, to me. It’s a privacy thing.
While I don’t exactly have photogs beating down my door to snap my image, I love getting my picture taken. Mainly because it means, hey, someone’s actually paying attention to me for a moment.
If they would just leave it at taking my picture and not going forward with developing the film and printing the photo, we’d all be happy.
I don’t know how common it is. I have a rather serious aversion to having my picture taken especially without permission. It’s very disturbing to be out and about and have a stranger point a camera at you, with acquaintances, friends and family it’s only an unsettling mild irritation.
It seems to me that people think they look bad in photographs because thye have that 'Don’t photograph me, I look bad in photos" look. Me, I don’t care, take whatever picture you want, I look stupid in a lot of them, I look fine in others, but it’s just me no matter what. I’m fine with that.
It bothers me when people don’t ask if they can take my picture first. I don’t know why. I guess having my picture taken when I haven’t given permission feels like an invasion of privacy. Which is totally irrational, but there you go.
If you ask, however, I’ll usually say yes, unless I have reason to believe you’re going to do something stupid with the shots.
Suggestion: if you want candid shots, ask everyone beforehand if they’re okay with it. Then knock your socks off with the people who say yes.
I love having my picture taken. In fact I will insist that you take my picture if you have a camera. To me it is a way for people to not forget that I was actually there. I have this really big issue with people forgetting me, and a picture is the best way to make sure noone does. If you see me at a Dopefest, please remember this.
It perplexes me that people don’t want their picture taken (how in the world could you possibly want to be forgotten? What does privacy matter when the very nature of parties and get togethers is to not be private!? What does it matter if you don’t find yourself attractive!?! Pictures are not for beauty, but as physical proof that you were there!!!).
But I do respect it nonetheless.
I’m ambivalent about pictures that are taken of me with or without my permission. I have no idea why some people have such an aversion to being photographed. When they’re out at the mall they’re being filmed doing their stupid everyday stuff, when they get pulled over by cops they’re bound to be videotaped, if someone is at a public event where there are lots of pictures then there’s a good chance that their image will be included in a photograph and if one is in Europe (particularly the UK) they’re going to be videotaped by the ubiquitous video cameras put up by the police. It’s not like the photographer is doing upskirts or using a pinhole camera in the bathroom to catch someone in the act of pissing.
One thing that surprised me is that I attended a party and it was plainly obvious I was taking pictures of everyone. When I made a nice website about the party featuring the pictures they raised an unbelievable shitstorm because I was posting their pictures without their permission. Of course when I asked for permission they universally gave it which confounded me. The pictures weren’t risque nor were they unflattering and I chalked it up to people wanting to be control freaks over little stuff because the big shit in life grinds them down to nothing. Or they think that I’m stealing their soul for some wild pagan ceremony to entrap them in eternal servitude as my zombie slaves. They knew I was taking pictures, they knew that these parties were always immortalized on the web, it’s not like this was a new experience.
It wouldn’t bother me in the least to pass from this earth completely undetected. In fact, I try to pass through life more or less unseen.
And I respect that. 
I was happy to be able to take pictures of your sweetie at the Santa Rosa Dopefest on New Year’s. She was resplendent! I’m still waiting for her to use the tongue-sticking-out shot as her LJ pic.
I like getting my picture taken. It’s weird, considering I look horrible in almost every photo I’ve ever appeared in, but I always hope the next one will be great. I think it goes back to this concept I have that I’m not too bad looking. I just wish it would show up on a photograph for once, or indeed even be visible to other human beings.
I hate being photographed or filmed.
About a year ago, a reporter from the local “news” approached me at college saying something like “would you like to be on TV?”.
“No way!”.
The way she looked at me you’d think I insulted her religion or something.
I missed a golden humor opportunity in this thread:
“Yes. As a member of the Amish, part of my belief is that it is wrong to have my picture taken. I have tried to explain this to my English friends, but they think it’s stilly and photograph me anyway.”