Buffett on the Ideal Investor Personality
The most important quality for an investor is temperament, not intellect. You don’t need tons of IQ in this business. You don’t have to be able to play three-dimensional chess or duplicate bridge. You need a temperament that derives great pleasure neither from being with the crowd nor against the crowd. You know you’re right, not because of the position of others but because your facts and your reasoning are right.