Hi Shrinkrapt,
I think this is one reason that Birds of a Feather generally flock together--usually there are too many social disadvantages to being visibly and "chronically unique" where the Lowest Common Denominator prevails.
Beneath Pres. Obama's smooth "exterior styling," we all know there's a turbo-charged giftie *from* the 'hood, "under the hood"

(Ok, maybe he loses Street Creds for being from Hawaii; but he didn't *stay* there...)
Yep, one of the many things I love about Pres. Obama is that he waves the multiple-exceptionalities flag: Black! White! Multiracial! Asian relatives! Muslim relatives! Christian relatives (mixed in with everything else!) Single parent-Food Stamp-Childhood! *Chose* to live and work in less-affluent parts of Chicago as a prelude to Yale Law! Herded cats and swam with sharks as boss of the Yale Law Review! *Chose* to take his Yale grad degree *back* to Chicago! (as opposed to...Hawaii, for example, LOL)...etcetera.
There are mental/emotional conditioning processes that one can learn in order to "chill at will": For example, sports performance-rehearsal; and other focusing techniques; but in my case I never got into sports deeply enough to learn those. What I did learn was how to fake a certain level of confidence; how to "feel the fear and do it anyway"; and how to meditate/use affirmations, etc.
It's kind of sad, but I also taught myself not to blush, once I realized that it would be used against me...When not pressured I usually manage to keep a grip even when my brain is turning cartwheels with enthusiasm, ha ha. But under various kinds of pressure, results are a harder to predict.
In unsympathetic company I have to devote conscious energy to to maintaining the usual facade (whichever one is deemed appropriate to the occasion at hand....) Typically, though, what I want, "what I really, really want" is relief from oppressive tedium (if not also oppressive mind-control--the two in combination drain my batteries.)
You know, I watch the PBS interview program "Charlie Rose" for much the same reason that I enjoy watching and listening to Pres. Obama--Aside from the fact that they are both (IMO) highly attractive and well-spoken,

practically all of Charlie Rose's guests are gifties with some form of intensity. (Intellectual intensity just for starters.) But, particularly where arts and letters guests are concerned, his program provides a rare rhetorical opportunity for the semi-public display of passions which have little to do with sex, violence, or religion.
On occasion he hosts multiple guests during the same segment; but usually it's just one-on-one, in-depth conversation--no studio audience, no laugh track, no inane advertisements. Although Rose, himself, might be an extrovert (given that he knows so many people, and loves drawing them out); IMO the show is introvert-observer heaven: Like pulling up a chair alongside people worth listening to.