He's building the world's largest airplane, and it may never even make money . . . http://finance.fortune.cnn.com/2011/12/15/paul-allen-billionaires/?iid=HP_River
I had a post about PA, and then I deleted it. Not worth it. The rocketship is cool. As another news outlet posted: What's the best way to become a millionaire while running an aviation business? Start out a billionaire.
Paul Allen is a frat dude who got crazy rich (not that there's anything wrong with that.) I think most of the things he's done are exactly what a 19 year old frat dude would do. Buy a pro football team, buy a pro basketball team, buy a couple huge yachts, build a couple spaceships, buy cool rock memorabilia, buy sci-fi stuff from old movies, and fund brain research and buy some art so that chicks think you're smart and sensitive.
Always giving his money away, head up in the clouds. Just another unselfish socialist. You're supposed to accumulate wealth all your life. That's the point of life.