Rumor has it that he was an ass.
And yet, we have this grand quote:
"Opportunity is missed by most people because it is dressed in overalls and looks like work."
(
source)
And here is a lovely homage to the idea of how perspiration is the mother of invention:
So, maybe the guy was a good guy. Maybe he was a bad guy. I wasn't there. But I do think there is some good information when you study just the good stuff.