I think he was and remains a workaholic who has plenty of ideas, or recognizes a good idea when he sees it, and wants to make them reality. Some of them, like PayPal, Tesla, and SpaceX, have transformed the world and continue to do so. It's made him a billionaire and very eccentric. Maybe for better, maybe for worse. He certainly has a philosophy that's tough to pin down, though I know that some of it spooks me.
I'm giving him plenty of time to see how his Twitter vision plays out before I judge it.