The best rematch of all time to me was Liddell/Ortiz 2.
Ortiz had his ass handed to him, and STILL kept talking smack. What did Liddell do? Beat Ortiz's ass AGAIN, and Ortiz STILL KEPT TALKING. You can't shut the guy up, but you could tell from then on that Liddell owned Ortiz, and Ortiz knew it, no matter how much he talked. For example, on the Liddell/Ortiz season of TUF, when Ortiz was walking toward Liddell's team, you could see the fear in Ortiz's eyes when Liddell jumped from the octagon and ran at him. He just kept yelling and backing up, but the fear on his face was there.
As for a rematch I'd like to see, nothing would be better then watching Machida tool Ortiz again.