Suffice it to say I know a few things about a few things and get enormous satisfaction from sharing them with people. I'm privileged in that a couple of things I know how to do are worth stupid amounts of money, and perversely the more I try to give them away the more money gets thrown at me for them, so my businesses essentially allow me a lifestyle similar to that of a tenured professor except with less academic politics and an even more flexible schedule. Downside: a regrettable lack of cool faux-medieval robes to wear once a year.

I'm pretty happy with the pace at which I'm getting to take on new challenges, and pretty happy with my net impact on the world, including through building stuff and teaching folks. Besides, I'm not even 30 yet, so I've still got plenty of time to achieve total world domination through smoothing out market inefficiencies on the Internet. (I think I'll hire a tailor to get me robes as that point. Something in silk maybe.)