Until this year New England and Pittsburgh have provided some spectacular football games through this decade. Although I'm partial to the Steelers the Patriots have had an edge so far, but the games, regular season and playoffs have sparked a rivalry between the two teams that would be well served if the two teams were in the same division, and went to war twice a year.
Remniscent of the games between, the Browns/Ravens and the Steelers, the Pats versus the Steelers inflame football fans everywhere, Imagine the AFC North consisting of maybe the Jets - Patriots - Ravens - Steelers. With the Patriot, Ravens, and Steelers always competitive, and the Jets up and coming every game in that kind of set would be the game of the week, but the Steelers and Patriots twice a year would be Marque matchups.
If you believe I'm advocating a realignment of the AFC, you are quite correct. There are the natural rivalries and then there are rivalries born of competition, I believe the NFL ought to take advantage of each and every one that crops up.