@cjt23 - IMO, quality of the snake base on its appearance mainly depends on the uniqueness of an individual snake compared to others. Making the snake the best sample representing its morph. For this case, I'll be using Rabernet's collection (for Im so into his keen eyes in choosing bps). If you will look on some of his bps like his lesser, for me its so unique that you wont even bother paying extra just to get hold of it.

As for genetic stripes, most people do prefer the unbroken stripe.

But in the end, it all depends on the person choosing his/her own snake to add on the collection. We all have different taste. Ball pythons have different looks. And that what makes our hobby more exciting.