[musicale]

I think of the difference between:

Tim Cook: "We think you'll love this."

vs.

Steve Jobs: "It's insanely great!"

Given Apple's massive success I think they can afford to be more Cook-like, but a bit of Jobs-style fire, egomania, overconfidence and iconoclasm might help out when you're trying to transform an industry like PCs (Macintosh, iMac), audio players (iPod), or smartphones (iPhone). Though Jobs also had the seemingly (but not actually) humble "one more thing..."

I don't see a lot of humility - intellectual or otherwise - in Elon Musk, for example. But Musk's arrogance, like Jobs', is also backed up by ability to actually do things. And the ability to change one's mind, especially in the face of evidence, seems to be important.

I have also observed that effective self-promotion moves some people ahead of their humbler but more qualified peers.