He turned 50, today! I admire both him and Nikki Sixx for the same reasons. Both are very intelligent as well, which is always an asset. Duff, a high school drop out, later went to college, earned a business and economics degree and founded a wealth management company on top of all of his other projects with music and journalism!
I could gush all day.
PS. He started the wealth management company to teach people who come into sudden riches how to handle their money, because he didn't have that when he became an overnight millionaire through GNR.