The ones that seem best to me were shadow and cold. Light also seems a good one. Heat isn't bad either, but that's just not my personality. All of them seem good to me, but since I had to pick one, I picked shadow. If you don't learn from your mistakes, you normally won't get better. When I'm learning from my mistakes, I try to be rational and detached. When I learn what not to do from my mistakes, I try to figure out what to do next time.