Introversion

'From Darwin to Picasso to Dr. Seuss, our greatest thinkers have often worked in solitude, and in my book I examine lots of research on the pitfalls of groupwork. '
http://www.scientificamerican.com/article.cfm?id=the-power-of-introverts
More on creativity: http://www.dailygood.org/view.php?sid=193