I know a number of pretty brilliant people. Unfortunately, I'm pretty stupid these days and don't think I'm in the position to judge. Fuck, I hate getting dumber.
My dad. I know it sounds lame, but he knows about EVERYTHING. I've never seen him meet a person and not be able to carry an intelligent conversation about whatever that person does or is interested in - engineering, nursing, airline pilots, flight traffic control, doctor, lawyer...it blows me away every time.