I don't know of much other snakes that periscopes the way ball pythons do. I'm also very interested in their natural history. But a normal ball pythons's pattern is simply one of the most graceful, cryptic and sophisticated pattern of any other (normal morph) snake, and I'm probably more awe-struck by a healthy and bright normal BP than something like a banana-calico-whatever morph. I guess I'm weird like that.
I also love how powerful a snake can be, and how formidable of an animal they are, especially for something that's essentially a tube. The only other tubes in the animal kingdom are either fossorial bug eaters or parasites. I'd say that's quite the evolutionary achievement for a snake.
Snakes were also the inspiration for dragons, and 'serpents' are the only "real mythological" creature. (well, them and narwhals anyway)