I think I take more pics than have pics taken of me, but that's cuz I don't usually do really popular characters. My friends do though, so sometimes I end up sneaking into their pics. XD
I usually don't pose cuz I just don't think about it. Sometimes I try to think of a pose to use everytime, but I usually forget. XD I say if you have a cool pose you want to get a pic of, you should ask. If they say no, then oh well, at least you'll get a pic period. ^^ I usually don't ask for poses, but that's cuz my group is usually in a hurry or I don't want to waste time if the person I'm taking a pic of is in a hurry too. : P