I didn't see the fight so I can't comment directly...
I agree that the fighters must put in a tremendous amount of emotion in order to sustain them over the months of training, however I'm usually a bigger fan of the fighters who can get past losing. I once had a conversation with a guy about wrestlers transitioning to MMA. Although the consensus was that wrestlers hated losing, they let go of their losses much more easily than those who came from other competitve sports. In the career of a wrestler, they will inevitably lose. If not in competition, then in the thousands of practice matches they have over their life as a competitor. In some ways you get used to losing, you just do better next time. My friend contrasted this to other sports (sport JJ) and remarked, some people never had the hard competitive life which encompassed losing, so when a loss finally came, in broke them in some sense. They were not mentally equipped to deal with losing. Also, some people enjoyed fighting, and didn't take their validation from winning MMA all the time. They enjoyed the fight and from learning from it. When Matt Hughes lost to BJ, he had a sort of "aw shit, oh well" look on his face, then came back to be champion again. When Randy beat Rizzo the first time he had a sort of "no shit, i won?!?" look. Both probably hate losing, but have lost enough in order to know that they'll fight again, and it's just a speed bump, not a bottomless pit.
"If you never lose, you're not fighting the right people." -Matt Hughes, TUF season 2
"Strong men cry too. Strong men....cry too." -The Big Lebowski