Here's a good video I saw over at Belgiankneewarmers
I love the pictures of the pros just turning themselves inside out. Lance, Ullrich,etc. Attitudes, doping allegations, million dollar salaries aside there is no doubt that they know how to suffer and how to make themselves suffer.
Cycling is one of those sports where the pain is self inflicted for the most part. The desire to suffer the ability to push yourself to suffer is a trait I much desire. High maximum sustainable power would be nice too but that's byproduct of the former.