@ Evergreen,
Nothing is "wrong" with her. It is just that carpets are, by their nature, extremely active and energetic snakes. My wife wants to have a snake she can handle easily. I guess I was not clear when I explained to my wife that with regular "hands on" time she would be a handleable snake, which she is. However, a handleable carpet is still very active and mobile and wants to be free to move. A carpet requires constant attention and position change to keep good control of the animal (they also seem to have a very unnerving habit of occasionally staring straight into your eyes.) By contrast, a ball you can basically set in your lap and just ignore it. You can easily direct a ball to where you want it and it'll go there and stay there without much fuss.
@ Ant,
It is a matter of space, I do not have room for another big tank. Adult carpets and balls take at least a 55G tank or equivalent. A 55G is 120cm long. The only place in the house where I could put another tank that size would be in the crawlspace which is rather a cold area for a snake (I use it as my highland grow area after all.)
She does feed her snakes, unless I am just so into the vibe of feeding that I do it out of habit (which usually gets me yelled at LOL.)