#3 Jungle Carpet pythons. Not much in the snake world looks nicer than a jet black and lemon yellow carpet. I also love the ivory ones. My favorite though may be the 'German' type animals. 'High Black' kinda. Nice yellow rosettes thrown on a jet black background.
#2 Diamond Python. I find myself drooling over these all the time. I especially like the high-yellow specimens, but hell, they are all awesome.
#1 Chondros. They may win this one on just diversity alone. There are so many colors and phases. Aru's have the awesome white dorsal scales and stunning blue ventrals. Many Biak's retain a good bit of yellow. Sorong/Jaypura/Mainland animal's are known for their stunning blue dorsal patterns. You also have your might phase, high yellows, blue-line, and mixed lineage animals. What's there not to drool over with these guys?
Honorable Mention...(in no order)
Moluccan pythons, high-contrast barneck scrub pythons, Bredli, Boeleni, fuscus.
Bo