I'm a big fan of Myers Briggs - the 4 letter assignation that is given to people for rating their personality. Most people lie on a spectrum between E and I (Extrovert and Introvert). We all have quiet time and noisy times and whilst you could consider yourself an Introvert since this is what you prefer, it could be very context sensitive. I expect if you profiled many tech entrepreneurs they would tend to be some sort of hybrid between E and I.
Today we're going to delve into the murky depths of Jungian psychology, and examine one of its most popular surviving manifestations. The Myers-Briggs test is used all over the world, and is the single most popular psychometric system, with the full formal version of the test given more than 2,000,000 times a year. But is it a valid psychological tool, is it just another pop gimmick like astrology, or is the truth somewhere in between? ...
I think it useful for helping gauge what makes people tick, remember that people lie on a spectrum. Everyone [I know] who has been through has commented that it has provided some insight into how they work. It doesn't pigeon-hole people: after all its not a psychiatric label and simply attempts to crystallize a few key traits into a manageable form. Life is spectrum and MB gets some of these key axes right.
Wasn't it Jung that defined the extrovert and the introvert?