A while back I was interviewed by freelance writer Jeff Pearlman for a piece he was writing about a multi day Sri Chimnoy running race. Here is what was published:
"Ultramarathoners are not crazy, although I'm sure many people think we are," says Sibylle Tinsel, head of the Vancouver-based Club Fat Ass, one of North America's larger ultrarunning organizations. "We're a group of people looking for more. A lot of us are type A personalities who want to go on forever and always go hard. Many others I know have been addicted to one substance or another and turn that addiction into real hard-core running. What's undeniable is that we're bonded by a single thing: the desire to go farther and farther."
Not sure if I personally have the drive right now to "go farther and farther", considering I only managed 25km on New Years Day, but I think the quote does some it it pretty well.
Here is a link to the complete article online:
http://www.runnersworld.com/article/0,7120,s6-243-297--11402-0,00.htm