My 20/20 hindsight only remembers the great ideas that I never got around to chasing. (In 1991 - going long tech in Tel Aviv, in 1996 voice recognition for mobile...) As I've gotten older, the ideas come less frequently, perhaps because I've learned so many ways to dismiss them.

I think kids change our ambitions too. We care more about them than more broadly changing the world.

But when THAT idea strikes, I know I'll chase it.