I don't know man. IMHO they are all evil. I'm not just talking about politically skewed but that is certainly a big part of it.
Fox has it's right wing agenda that it has to protect at any cost regardless of how it bends the truth and all of the others are skewed to the left...although MSNBC goes as far to the left as Fox is to the right or further.
I am politically pretty conservative but I watch CNN often because it is the evil that I know. I don't like Fox because I hate that they practice the same tactics that I hated coming from the left leaning media.
What they are all practicing now is horrible.