It's so funny; I grew up in the Midwest, I have two older brothers, and you're just as competitive playing football as you are eating pickled eggs, or trying to kill zombies. As long as you don't take it too far, I think it's a good way for people to relate.
In martial arts, the way that they train really does channel that killer instinct. We used to put motorcycle helmets on and go full force at each other with these sticks to train.
I studied Jeet Kune Do and Brazilian Jiu-Jitsu. On element of Jeet Kune Do is that I had several of years of practice with the kali stick - a stick with a size and length similar to a baseball bat.
I'm not a bad golfer, and I'm not the best, either.
