"Limitations breed creativity"
We only solve problems when we are faced with them and with this in mind I enjoy setting new challenges for myself.
I sometimes set myself what others consider to be unnecessary restrictions but I think of restrictions as positive. They force me to think and work in new ways. When I'm free to do what I want I have a tendency, as we all do, to stay firmly in the safety of my established comfort zone. Once I construct challenges for myself I find that the limitations, rather than limiting what I can do, actually increase my skill, productivity, knowledge and understanding. Why wouldn't you want to do that too?