In all honesty, you have to decide what you like. What I mean by this is if you're not totally happy with what you're breeding then you may not enjoy it as much. You have to figure what morphs you like and what kind of snakes you want to produce then go from there. Also another thing to consider is that what you want and what other people want may differ.
For instance I don't really like pieds or albinos, so I won't breed them. Unfortunately for me, that's what sells. I'm breeding because I want some morphs that I don't have thousands to fork out and it'll be a neat experience. In the meantime I'll sell the babies I don't hold back to cover hobby costs and possibly even profit a bit.
You have to go for what you want though my friend. They have awesome morphs and genes and it all varies depending on what you're looking to spend.
Pastel, Spider, Pinstripe, Black Pastel, Cinnamon, Mojave, Lesser, Butter, Fire, Calico, Enchi and the list goes on.
Go with your favorite morphs and then work from there, play around with the genetic wizard to see what you need to make other morphs that you like. Hope this helps.