The well known - Pouty/Moody go away glance.
The Celebrity - Look away and they can't see your beautiful face.
The Look Down - look at the floor/ground/carpet so that your eyes don't show.
The Look Up - only achieved by having your photographer have 15 live birdies dancing on her head.
The Full on Mug Shot - this look is only achieved by having the photographer dangle a whole leg of lamb in her teeth, while coated in a layer of fancy feast.
My mum says sometimes it takes a bit of work to get a nice photo of me. I don't know what she is talking about, they're all great.