While we're on the subject of hugely creative individuals making legendary games, Kotaku has a great piece on Sid Meier, creator of Civilization :
Sid Meier doesn’t like thinking about business, and he clammed up a bit when I asked him about MicroProse’s new ownership. “Sid didn't want to be involved in that at all,” Stealey told me later. “No business—not at all.”
“Sid is happiest in his office writing code,” Solomon said.