Steve Jobs, Barry Diller and Martha Stewart are hailed for their fierce commitment to vision and for their ability to make big companies move with the agility of a startup. They can also be scary to work for. "They push people aside who are too conservative or 'just don't get it.' But they also attract -- and are very protective of -- their followers," says Stanford Business School professor Roderick Kramer. Does yelling and micromanaging work? Sometimes, says this article.