Re: What makes an entrepreneur? Grittiness!
I would agree, @cbabcock. Also, many entrepreneurs partner on a startup so the dynamics change then, too, like in any other relationship. Even if it's not a 50/50 partnership, the people an entrepreneur chooses to surround themselves with helps or breaks a business: if an exec is overly optimistic, for example, they'd need someone to balance them with a more realistic outlook on the world. If someone is uber creative, perhaps their counterpart should be more of a logistics and day-to-day business person. Many successful companies began with those roots. Being entrepreneurial is part magic, part science, and part chemistry. No test needed.