Buffett sticks to his investment principles.

Warren Buffett is one of the greatest investor of all time. What lifts him above his peers is a determination to stick to his investment principles. Buffett has steadfastly refused to jump on any bandwagon. Unlike so many other investors who are nursing burnt fingers, Buffett let the dot-com train roll on by. Famously, he refuses to invest in businesses that he doesn't understand - which includes most high-tech companies. Instead Buffett made a fortune for himself and his shareholders by investing in undervalued companies for the long-term. It's Buffett's willingness to buck the trend that makes him worthy of his 'Sage of Omaha" tag.