Risks
Taking risks, apparently, is a necessary component of a fulfilling life.
If I do not take any risks — I still might have some achievements. But they will bring me very little (if any) joy.
My real-time and turn-based strategies playing style illustrates this well. I avoid confrontation, until my army is so big that adversary has no chance. Instead of trying to create the most from resources I currently have. Probably, that is why I never became good at any game...