Optimist. I always see most everything in life as half full, and try not to let anything get me down.
I never quit when I played sports, and always saw the scenario of the win when the team I was/am rooting for was/is down. I have been at my sports bar quite a few times where many of the other Dolphins fans I was with took off expecting the loss, and I stayed for good or bad.
When I was younger I never quit, and always expect my favorite teams to also not quit, and come back or win.
Some people unfortunately will call themselves a realist when they're really far from it, but I know what I am and admit it.