For the most part, having more money and more fame make your life harder. It just does. I've seen it happen with people. You know, it's so hard to stay normal. It's so hard to stay happy. It's hard to remember why you were doing what you did in the first place.
My time at Shell was a most valuable experience because it taught me to look at the world in a long-term way. Shell takes a 20-year view on events and plans for different scenarios. It makes you see the world as a kind of large matrix.