I enjoy the act of collecting them. Thinking about which ones to add next is almost as exciting as actually recieving the new additions and having a new family member(s) to care for and watch grow. Right now I enjoy them being just a simple hobbiest that has no breeding plans for the near future.
As for what I acutally do with them, I enjoy handling everyone from time to time (some more often than others) and like watching them in their tubs (or watching my corn in his tank: he's quite the clown). As my tubs arn't totally opaque I get to spy on each of them when they're out and about.
My normal ball and Jungle boa seem to quite like being out and about to explore in blankets or around on the floor.