Interesting that the top 4 teams you consider rivals, or maybe more accurately dislike the most, seem to be more about the fans than the actual players and teams. I would bet that fan dislike is the biggest reason for many others who claim to dislike programs.
+1. How anyone can consider OSU a "Rival" is beyond me. A rivalry is a series in which both teams have had some success. The OSU series is more of a beat-down from NU's perspective.