I just read an article on the New Yorker web site about Steve Jobs.
In addition to the quirks (to put it mildly) that he demonstrated, the article said that he had one key skill: he could see the improvements that something needed. He couldn't see them in the item itself, but when he was presented with alternatives to the item, he could pick out the alternative that would make it better. The article says that he wasn't a visionary who saw a better world and reshaped it; he was a tweaker who took the existing world and changed parts of it slightly until they reached perfection. Or at least whatever he thought perfection was at the moment he thought it. No bets on whether that changed over time.
An interesting thought. He couldn't create perfection himself, but he could demand it from others, and recognize it when they did. Working for him must have been both exhilarating and exhausting.