In my opinion the aspects of quality vary from morph to morph....For example albinos: Most like a high contrast with little "bleeding" of the colors. I may be almost impossible to tell as hatchlings how they will look as adults. It really depends on what you like in the snake. Look for a nice clean crisp pattern and look for animals that highlight the qualities that make it a morph.
Not sure if Im explaining what I am trying to say here the best but I hope this helps you some.