I sort of half concluded that people with closed doors are more likely to be introverts and thus less likely to look for fame. :)

I'm not saying that you are saying the opposite, I'm just saying that the cause/effect is very much up in the air. I never thought it was as straight forward as asking "what is better?" (as he rightly asks too)

Personally, I never looked for fame (and I'm old enough to say that I likely never will look for it). In the end, what I want is: to be right. Even if it takes 100 wrongs to get there. With that in mind, I would be better off if I was an extrovert as I'd probably get through the wrongs quicker than if I preferred my solitude.

But as it stands, I like to be able to stare absentmindedly in a random direction without the risk of accidentally glancing at someone's new hat or haircut.

I don't know if I am slower or slightly wrong. I would not rule it out, though. :)