I have a normal ball, a male Hog Island Boa, a female Jungle Carpet Python and a Brazilian Rainbow Boa. Of this group my favourite is the carpet. She is more of a display snake, never in her hide and moves around a lot. Plus she is beautiful (not nearly as the Rainbow) and interesting. She seems to be always in view and the others sometimes just seem like they are not there, always in their hides (except my Hog Island who likes a warm bath and hangs out in his new, larger water dish).