That was basically going to be my comment, I'm fulfilled by beating the game. Resource acquisition is a Massive Multiplayer game.
I'm fulfilled by the industries I enter to make revenue or sell a company, I'm never doing something grueling and dead end, I feel good about successfully avoiding being in that kind of situation.
I'm fulfilled by enjoying the spoils of success. I'm fulfilled by extending the length of time I can enjoy them. I'm fulfilled by parlaying that into passive income or a nice portfolio, or investing in other high growth assets at my risk or peril.
But making a forever company? Its never appealed to me, and when I look at other's it doesn't make sense to me. There's always something unobjective about it, burdening their family with a reputation to always defend. I dated a woman that grew up on a decently industrial farm, she was interested in Fortune 500 corporate work and excelled at that but having to prove she wasn't an unsophisticated farmer was a common point for her. I asked the father why farming, he said "feeding the people is so fulfilling", it wasn't until I found the grandfather that I got an objective answer. The grandfather was the one with the portfolio of companies and he set one child into the farming one, and another child into the entertainment ones - golf courses specifically. The grandfather was the person I could relate to. Just an example of things I see a lot. Don't get married to a position, don't burden your family with your obsessions.
I am my own lifestyle company.