Temperament
Warren Buffett on what it takes to do what he does:
It’s a temperamental quality, not an intellectual quality. You don’t need tons of IQ in this business. … You need a stable personality, you need a temperament that neither derives great pleasure from being with the crowd or against the crowd because this is not a business where you take polls. It’s a business where you think. And Ben Graham would say you’re not right or wrong because a thousand people agree with you and you’re not right or wrong because a thousand people disagree with you. You’re right because your facts and your reasoning are right.