Cook counts Steve Job's willingness to change his mind as a tremendous asset. One tale claims that Steve Jobs demanded a switch from a plastic to a glass screen a mere week before the launch of the original iPhone, after finding that his keys scratched the prototype's plastic display.

From Businessweek: "More so than any person I ever met in my life, he had the ability to change his mind, much more so than anyone I’ve ever met. He could be so sold on a certain direction and in a nanosecond (Cook snaps his fingers) have a completely different view. (Laughs.) I thought in the early days, “Wow, this is strange.” Then I realized how much of a gift it was. So many people, particularly, I think, CEOs and top executives, they get so planted in their old ideas, and they refuse or don’t have the courage to admit that they’re now wrong. Maybe the most underappreciated thing about Steve was that he had the courage to change his mind. And you know—it’s a talent. It’s a talent. So, anyway."