Why do wrestling fans on the internet cheer heels but boo faces? and WQ?

You know what, I have been asking the same question for years. John Cena is a prime example; I never understand why he's being booed. What has he done? And why cheer a lily-livered punk like Randy Orton? I don't know. It doesn't make sense to me either. As for MVP however, he seems to have gained some popularity with the crowds after he turned face the same time that Matt Hardy turned heel. I do like some heels...Big Show's ok, but he needs to leave Cena alone and accept the fact that he lost. But it does depend; the WWE Universe is a fickle group.