If anyone hasn't seen this yet, I highly recommend watching this interview with Gabe Newell conducted by a high school marketing/economics class:

http://www.youtube.com/watch?v=GOMI0BxB0yA

Gabe Newell is a founder of Valve Software and I believe he is a true visionary in the industry. Steam would likely not be what it is today if it weren't for his leadership at Valve.