I loved every minute of my time at Microsoft, but I had always envisioned having another phase of life just because I thought that would be interesting. It had never been my plan to work until I literally didn't want to do anything and then hang it up.

If you look at companies with upside potential, Twitter's right there. They've established a brand in a world where it's extremely difficult to establish a brand. It's a global brand, people recognize it, people want to let you know what their Twitter handles are, etc.

The company I invested in is probably a leader in that area. They're a company called Second Spectrum, which happens to be based in LA but was started by two USC computer-science professors. It's filled with guys who love sports, who played sports, but really look like programmers.

Look at the product pipeline, look at the fantastic financial results we've had for the last five years. You only get that kind of performance on the innovation side, on the financial side, if you're really listening and reacting to the best ideas of the people we have.

Maybe I'm an emblem of an old era, and I have to move on.

I want people to understand the amazing, positive way our software can make leisure time more enjoyable, and work and businesses more successful.

A plane is a guilty pleasure. I have one. It's a great luxury. I appreciate it. I couldn't do what I do. It's not something you can write down as anything other than, "Wow, I can't believe I have this and I'm absolutely spoiled and entitled." On the other hand, I have one and I use it.