I love big whisker pictures.
Here is the site I have bookmarked with rat types and colors.
http://www.camarattery.com/colors-markings
If they are acting crazy, to get good pics use a fast shutter or switch your camera to sport or burst mode. In burst mode it keeps taking shots and you usually get some good action stills if you take pics of them wrestling.
But I agree, these shots look like you bribed them to pose for the camera. My boys are probably lazy enough to get a good picture but my ladies are nuts.