Below is a fantastic post by Brooke B. Sellas on the art of listening as a marketer - it reminded me of Susan Cain's book Quiet: The Power of Introverts in a World That Can't Stop Talking. What made Cain's book so powerful to me, is that she described introverted personalities as an asset to various businesses for reasons very similar to Sellas'.
Cain talks about the rise of the Extrovert Ideal in the last few centuries and argues for the leadership potential of introverts (while sharing plenty of inspiring examples of introverts). Ultimately, instead of seeing what makes you you as a weakness - it can be a strength.
Active listening, something many introverts naturally do, is not only a great way to learn, but also will help you understand your clients' viewpoint and manage conflicts better.
I think everyone has an introverted side to them - if you normally think of yourself as extroverted, maybe it's time to get in touch with your other self and embrace the silence!