I've bumped into him once or twice over the years, most recently at the Homebrew Computer Club reunion, where he gave a great talk full of enthusiasm.
Woz was a breath of fresh air after Ted Nelson's keynote-of-sorts, which was interesting enough but so sad and bitter! (Anyone who was there will know what I'm talking about.) I suppose I can relate to that, as someone who's never had the kind of success I could have imagined for myself.
But Woz reminded me that no matter what happens in your life, stay cheerful and enthusiastic and never let yourself become a bitter old person.