This is a very vague question, and very much dependent on personal preference/opinion. My suggestion is to go to www.worldofballpythons.com and play with the genetic calculator. Throw together some morphs you like/can afford and see what you can pop out. Have fun with it, and remember: What is a super sweet combo to some, is drab and bottom of the list to others. Do / make / buy what makes YOU say "wow!"