The Cowboys - Fans all over the country that could not point out Dallas on a map. All those that are Cowboy fans because Dad liked, the Bills, or the Redskins, the Eagles, or whomever, because they were little punk teenagers that grew into a**hole adults. Those that root for them when they are winning, for some other team when they are winning, I have deep dislike for those people.
The Jets - No real lucid reason, I just hate them.
The Steelers - Mostly for the same reason I hate the Cowboys. Except Steeler fans tend to be bigger jerks.