Breeders: Have you ever kept a pet-quality puppy?

If I had the room and time, I definitely would keep a pet quality puppy. I would enjoy having a puppy from one of my litters that I only planned to do performance events or therapy work or tracking/herding, etc. with. But because I don't have the room or time right now I am only going to keep pups that are show quality and have the potential to be bred one day. I will do other things beside conformation with these dogs too though.