Something I would like to add to this conversation is that a number of years ago when I had made the decision to shoot bucks that only met my own personal criteria,it settled me down.Being more analytical in judging bucks has kept the adrenaline at bay quite a bit,it has allowed me to watch quite a number of bucks in a pretty detached way.
Any time the decision is made to take a shot the adrenaline still definitely flows.