Look for combos you like.
I have a plan to get a lemon blast male, black pastel female, and a pastel female.
Even if the 2 females I get are not ready to breed for a year or two I have a 1800+ gram normal female I could breed to help make a few extra bucks.
So in my first year I can make normals, pastels, pinstripes, and more blasts at least. If the other females go I can also make super pastels, super pastel pins (super blasts), black pastel pins (black pins), pastel black pastel pins (black pewter blast), and pastel black pastels (black pewters) So with those 3 morphs I have a goldmine of possibilities
Turn around and sell/trade them and I'll have more $ to further projects.
After I get these 3 snakes I have an idea of the other morphs I'd like to add to the collection. Like a fire, maybe some recessive (pied or ghost), enchi, and a few others.
In all look at morphs YOU like and go from there.
http://www.worldofballpythons.com/morphs/