When I was in college studying Comp Sci I did a whois on Woz's domain and sent an email to the registered email (this was generally before the days of free whois protection), not expecting a response, just mentioning how cool his work on the Apple I & II was among others, and how as a CS student was exciting to see where technology had gotten to, asking him what he was up to.

I got a response a day later, thanking me for my email, talking about how he loved hearing from students, telling me about his current dancing with the stars stuff (this was in late 2009), among some other quips and such.

Felt incredibly down to earth and casual, and while I know it only took him maybe 5 minutes to write that email, or maybe it was even copied and pasted, it was super cool to get a response from such a tech icon.