Time with my son, watching him grow up so he can fly a 5 wood past my best drive.
Time with my wife, who is the fastest walker I have ever played with.
Time with friends.
The knowledge of how I react to various situations, good and bad.
Competition.
Hours alone to enjoy trying to be better, trying to be my best, even if that is not really good enough, and will never be good enough, but the quest to try is what it is all about. You can never be as good as you want to be, but the journey makes the destination unimportant. Of course, I have only been playing for 50 years so there is still time to work on it, and that is the best of all.