#1 Hollywood Hulk Hogan - Wrestlemania 18
When Hulk Hogan left the WWE in the mid-1990s, people couldn't imagine him as anything other than the prototypical babyface. Then came his earth-shattering heel turn in WCW. The Hulkster aligned himself with Scott Hall and Kevin Nash to form the nWo and his Hollywood avatar became despised all around the world.
So, when he returned to the WWE - as a heel - he was widely expected to be booed. So, it made sense to put him up against The Rock at Wrestlemania 18. Except, the crowd in Toronto had other ideas. They turned the tables and got behind Hogan to a never-before-seen level.
So intense were the cheers that Hogan was turned babyface in the middle of the match in order to accommodate the wishes of the fans.