Whatever he may believe, the goatee had less to do with his landslide victory than his extrovert personality.

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"The core of the extrovert's personality is really wanting to be the center of attention, " said Bendersky.

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"Within limits, most of us can operate very effectively in ways that are not within our preferred personality, " says Arnold, noting that an extrovert can be perfectly capable of behaving calmly when appropriate.

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Likes for "beerpong, " "Chris Tucker" and "cheerleading" were strong predictors of an extrovert while "role playing games, " "Anime" and "Voltaire" pointed to introverted personality types.

CNN: Heather Kelly,