Very interesting post ! The 3 questions really resonate with me. Usually when talking startups, people talk about changing the world, having and impact etc. Your take seems much more personal, and also that's the way I feel it (although I can't explain that to me rationally).

The 3rd is so true - in big corps, you think you're responsible for this and that because you're the tech lead, project manager or whatever. But most of the time, that's not really true - nothing bad will happen to you if you don't deliver. When you're starting a startup you suddenly realize what personal responsibility means.

Anyway, thanks for a great post !