I wasn't all that disappointed in the fight.
The last time I bought a pay per view was Tyson Spinks, when Tyson knocked out Spinks in 91 seconds. At the time it was a disappointment but in retrospect I'm glad I got a chance to see one of the all time great knockouts.
I wasn't expecting a knockout this time, especially given Mayweather's more defensive, counterpunching style. Although I was expecting De La Hoya to be able to mount a more extended attack. Even in the late rounds, he would start to rally but couldn't keep it up. He'd get hit once by Mayweather and that was it. He'd go back to his shell and stop even throwing the jab. And in the second half of the fight, De La Hoya started fighting small - all hunched over, negating his size advantage.
I thought it was actually pretty interesting that I (like Tommy Kaczmarek) had De La Hoya winning seven rounds to five, but the whole fight, at least from the sixth round or so on, felt like a Maywether domination. The rounds I had De La Hoya winning were all close but De La Hoya pushed the action. The rounds that Mayweather won, he completely dominated.