I hate when a wrestler completely changes his wrestling style simply because he becomes a face. And I am not talking about cheating.
In 1994 and 1995 Shawn Michaels was gaining popularity as a heel. Yeah, he cheated, but not always. He was putting on excellent matches even at house shows. I'll never forget being at a house show at the United Center and these two huge guys who looked about the size of Harlem Heat were sitting in front of me. The moment Michael's music hit, they got up and started dancing like crazy. It was wonderful.
Then, they turned Michaels into a face and completely changed him. He became a Hulk Hogan clone of getting his ass beat in the match only to have the inevitable super comeback. It never made sense to me why they do this because he was gaining popularity due to his wrestling and character, so their solution is to make them a face, change their wrestling style and then change their character. Idiotic.