I really like thislist of the top-ten Linus Torvalds' quotes, as compiled by Computer Business Review. Linux is Linux in large part because Linus is Linus: A strong personality but disarming and approachable.
That latter attribute plays out in my top-two favorite quotes:
Some people have told me they don't think a fat penguin really embodies the grace of Linux, which just tells me they have never seen a angry penguin charging at them in excess of 100 mph.
When you say, "I wrote a program that crashed Windows," people just stare at you blankly and say, "Hey, I got those with the system, for free."