Actually, the one thing that most people with abnormally high IQs have in common is that they have failed a lot in life, especially in school and in the workplace. Einstein failed the entrance exam for Zurich Polytechnic. Thomas Edison, despite being amazingly intelligent, tried over thousand times before he created the lightbulb. Also, a recent study showed that children with high IQs generally have lower grades than children of average intelligence.
oh, and for those who are interested, I finally dug up the Epicurus quote I was talking about earlier;
Every man should examine his own genius, and consider what is proper to apply himself to; for nothing can be more distant from tranquility and happiness that to be engaged in a course of life for which nature has rendered us unfit.
An active life is not to be undertaken by an inactive person, nor an inactive life by an active person; to one, rest is quiet and action labor; to another, rest is labor and action quiet.
A gentle man should avoid a military life, a bold and impatient man the easy; for one cannot brook war, nor the other peace.
I don't think I need to explain why he is my favourite philosopher.