I was curious more about how you think about your own time at this phase in your career -- are you mostly 'playing'? Is this "serious play"? Is it motivated by anything beyond personal interest?
I ask because I'm monitoring my own projects and time commitments more seriously as I hit my mid 40s and trying to make sense of how and when I've had the best impact, globally, personally, to my own happiness, etc.
One of the keys for me seems to have been to pay attention to what interests/intrigues me, and I'm curious what your experience is on that front as well -- you have a pretty unique amount of experience assessing and watching companies that have in some cases made a major amount of change in the world.
Anyway, I guess I'm just asking for a sort of 'mid career thoughts' essay from you, or at least wondering if you're thinking much about it.