The crowd and the atmosphere can certainly make me think a match is better than it is. I have a great example too....

John Cena v Triple H - Wrestlemania 22

This match was great, but it was made so much better by the fact that the crowd were so into it. They were cheering every single Triple H move or right hand and booing the Cena ones. This made for a great atmosphere especially seeing as Triple H was the classic heel and Cena was the underdog face. The crowd made this an unbelievable match, a classic in my opinion. I guess that is one thing Cena brings to the dance.

If the crowd is flat the match usually isn't as good to watch