All 3 are incredibly animals. We've owned Horned frogs, and currently have both Pixies, and Ball Pythons. The Ball's are a snap to take care of, and make an impressive captive.
The Pixies do as well. Especially if you can acquire a male. With the Pixies, stay away from rodents, and other vertebrates as a staple, and only use it as a supplemental treat. They can become obese very quickly. Just get ready for a walking belly! Their personalities are to die for.