At first I thought this was a list you actually compiled yourself. Although many of these could be used to describe Ernests, some of them I'd refrain from. Including..
Often speaks rapidly
I don't think he speaks rapidly at all. His brain fires so quickly that he can think of brilliant responses in perfect comedic timing, but the way he speaks is slowed down and clear.
Sense of Humor That's Often Subtle
I disagree with his humor being subtle. Although some people struggle to grasp his sense of humor, I think he displays it prominently.
It's true he doesn't like to fly because of an incident that happened many years ago involving his plane loosing power. He doesn't like to not be in control of things, including cars. He feels saver being in control, but I'm not sure that makes him in the 'Not a Risk Taker' category. He seems to take risks out on court!
Whatever characteristics aside, Ernests is very intelligent. He likes to keep his mind working, and he is someone I'd certainly love having conversations with. I'm sure he can easily converse in a large array of subjects!