In 1999, Nintendo legend Shigeru Miyamoto gave a keynote address at the Game Developers Conference. An address you can watch here in its entirety.
Remember, this isn't the quasi-executive, Wii Music Shigeru Miyamoto we know today. This is the designer at perhaps the height of his powers, with games like Super Mario 64 still fresh in people's minds.
The talk, which runs for around an hour, covers everything from the history of Nintendo to his ideas on game design. Or, at least how they stood in 1999. Which I'm sure some of you may prefer as opposed to how they stand today!
Shigeru Miyamoto 1999 [GDC, thanks Christine!]