He was the #1 customer. I think he was building products that were good enough to use himself, because he knew that would impress others. He was a respectful narcissist.
Maybe I'm not using the correct words or my sight isn't accurate, but at least that's the legacy I got from his life.
Building something that makes you proud and you strongly believe it's the best. And convincing people to think about your product the way you do yourself.