I just finished watching GSP and Fitch on Spike TV. The last round was very moving. Before the round, GSP shook Fitch's hand, and gave him a pat of encouragement. At the end of the round, GSP fell to his knees and bowed to his opponent. That is true respect. After he got up, GSP told him that this loss would make Fitch a better fighter. THEN, GSP shook BJ Penn's hand, and said he would fight him or anyone else, no questions asked.
That is a true warrior.
BJ Penn, on the other hand, walks into the ring, obviously overweight, getting booed by the Target Center audience, but still trying to get their support anyway,gesticulating wildly, asking for their (non-existent) support. No class.