My wife asked me how I was doing mentally, since I retired, and retirement has some complications for some. My answer was: "I feel good, since I felt like I finished a project" (my working years). It's like a long construction project, when you complete your punch list, double check one last time, and you drive away. Everything is done, any maintenance requirements are for the owner, and whatever was built is now functional. It's a good feeling, and satisfying.