Rivalries form a large part of the fabric of the NFL.
They help keep the interest for teams who may not make the playoffs. If you're not going to get to the knockout rounds, you can still look forward to punching your most hated rival in the mouth and destroying their chances, too, right?
This mutually assured destruction attitude carries itself across both conferences and through all divisions, and the nature of divisional rankings, in particular, makes inter-division rivalries ridiculously competitive, and often brutal.
Which team rivalries are particularly pertinent in 2011? Which vendettas should you keep track of? Who will you back?
Feel free to vent forth your ideas in the comments: Which vendettas, blood-feuds or rivalries get your blood boiling and give you a reason to tune in once, twice or three times a season?