http://www.snake-zone.com/genetics/list
That link has some amazing info.
I think the burmballs and the carpalls and the walls look awesome. They have such crazy patterns. I wouldnt personally breed them because that just seems like a lot more work than I want to take on. BPs are enough for me to worry about, another stress over the husbandry of a new animal would be too much.
I classify my BP's year by the year they was hatched...and for the unknown ones I approximate it by weight and how big they are.