"In the corporate culture where I worked, a closed door meant a closed person — stand-offish, inaccessible and not a team player.
So I hid in conference rooms between meetings and in the cafeteria off-hours to concentrate...
I took the Myers-Briggs Type Indicator, a popular personality assessment, as part of a team-building program at work.
To my surprise, I discovered that I was an introvert — and that this wasn’t a handicap or a disorder,
but just an aspect of my personality with its own strengths and challenges.
I learned that introverts prefer to think before they speak, while extroverts tend to think as they speak.
I also learned what energizes introverts (solo activities) versus extroverts (social activities)...
Over the course of 12 years, I tumbled inside a kaleidoscope of meetings"
http://www.nytimes.com/2009/11/01/jobs/01pre.html