What I've been surprised by is not how different people are, but how similar they are. There are certain types of Airbnb people, and they are in every city in the world - it's just that in some cultures, there is more of a generational divide.
When you start a company, it's more an art than a science because it's totally unknown. Instead of solving high-profile problems, try to solve something that's deeply personal to you. Ideally, if you're an ordinary person and you've just solved your problem, you might have solved the problem for millions of people.
Somebody asked me 'what's the job of a CEO', and there's a number of things a CEO does. What you mostly do is articulate the vision, develop the strategy, and you gotta hire people to fit the culture. If you do those three things, you basically have a company. And that company will hopefully be successful, if you have the right vision, the right strategy, and good people.
I think the next big thing in music, and it's kind of because I come from the tech industry, is actually, I think it's the platform... Spotify is incredibly interesting. I think the platform is becoming the star.