Thing is, I think that everyone who watches Fox KNOWS that they have a bias. And we know exactly what that bias is; Fox doesn't hide it like the other networks did/do. However, they really do try to present both sides. When they have guest commentators in to debate a subject (and I'm not talking about opinion shows like The O'Reilly Factor), both sides are represented. When they talk about a political story, they have a representative from both (main) parties - people who work for the parties, not just some numbnuts they pulled from the streets up against a conservative professor.

The Fox opponents seem to always point straight to Bill O'Reilly. He's got a one hour show that is his opinion/commentary show. He is not the news, nor is he the majority of what airs on the network.