I'm probably in the minority in this, but I think an awesome project is to start with a single 100% het (pick any recessive trait you like) male, and some normal females. Breed father back to daughters. Finally produce visual morph years down the road. It will take a long time, but imagine how rewarding it will be when you accomplish your goal.

I do recommend you get a snake from a very reputable breeder for the founding male, cuz it would really suck to spend all that time and find out you don't even have the gene.

I also wouldn't recommend doing that project exclusively. Get some co-doms or something else going also so you are producing visual morphs, otherwise it could get really discouraging.

Most importantly, pick things that you like. Not just the morphs, but the individual snakes.