For me, the top rivalries in the NFL are:
1. Steelers vs. Raven
2. Packers vs. Bears
3. Cowboys vs. Giants
I picked all of these teams because, well, they hate each other! I also chose them because they are in the same division, which makes the competition heat up more. They always make it a close race at the end of the season. They also play a lot on Sunday and Monday night games because people like to watch these rivals. They are almost always great games. Those are some reasons why these teams made my "Top 3" list.