(Extracted from Barking Up the Wrong Tree by Eric Barker)
So there are successful extroverts and introverts and the world definitely needs both, but chances are, you’re not really either one. Yes, one-third of people are die-hard introverts or 24/7 extroverts, but the remaining two-thirds are what are called ambiverts.
… ambiverts make the best salespeople. Extroverts, who you might think would have the edge here, can be too talky or overbearing. Introverts are good listeners but may lack the social drive. When Adam Grant studied salespeople he found the top performers clustered in the middle of the introversion–extroversion spectrum.