In design school, we learned that we never really feel comfortable. We only feel uncomfortable–when things get too hot or cold. Room temperature is just right. Likewise, with our performance in various activities at work or play, stress becomes a trigger to take action: if I do too poorly, I'm stressed and pick up my game; if I do too well, I start to coast and sabotage my results. Success is oddly as stressful as failure. Golf handicaps are a prime example. They rarely improve much. The same also seems to go with weight and personal income.