I used to do the pursed lips thing a llloonnggg time ago. Not it just looks stupid.
I don't do the peace sign, mostly because if I'm taking a picture of myself, I can't seem to get my hand in the shot xD
I try all angles for taking a picture. Most often my good pictures are taken from above, I don't know why... I don't do it because I think it looks cool.
when people point a camera at me, I usually don't smile. I either make a weird face or wiggle my eyebrows.