I recently have fallen in love with the Borneo's and Blood pythons. WC bloods can be absolute monsters to deal with, but many CBB lines now have decent temperaments. They seems to be more of a nervous/shy snake at first, and their body language is more difficult to read than say a BP's, since they don't ball up when scared. With that being said, I made my species jump from BP, to a BCI, and then to Borneo's/Bloods, however I feel that with proper research going from BP to a Borneo could be done.