In the NFL, as in any competitive league, familiarity breeds contempt. That contempt leads to a spike in fan interest, endless content for newspapers, websites and sports talk radio which results in sold out stadiums along with television ratings that keep the dollars rolling in so the cycle can continue.
What raises a game from just another date on the schedule to a contest that has fans ready to kick down the gates of the stadium to be part of? One incident can spark of bad blood between two teams and their fan bases but put those teams in the same division, facing each other twice every season and an intense, bitter rivalry is sure to erupt.
The NFL is entering the twelfth season since the current division alignment went into effect so it's time to rate which divisions have the best rivalry games.