As you can see, North of 50 has a strong dislike for michigan. So strong as to not let him capitalize the name of the state. It is the life of an ardent Buckeye. He also takes a particular dislike of a certain Boston baseball team, who in deference to him shall go nameless. Such is the strength of his dislike for rivals.
My first induction to rivalry was in grade school. I hailed from Christ the King. The fierce rival was the adjoining parish, St. Catharine. I played basketball in my younger years and they were the team to beat as they were the next strongest school. The rivalry was such that I know of family members (not mine) who would not speak to each other.
My next venture into rivalryhood involved my high school. Loath were we to respect the Watterson Eagles. They were evil incarnate. In my latter days in school that changed somewhat, or at least veered off course. A new school, St. Charles reopened after many years taking part of the student body that should have been ours. Nothing says 'what would Jesus do' more than Catholics who want to pummel the hell out of each other.
So, what makes a good rivalry and what makes a good rivalry great? A good rivalry develops over time. A great rivalry mixes in a small amount of loathing. It also can not be one-sided for long stretches of time. Some teams believe others to be their rivals because they repeatedly lose to them. That doesn't mean the rivalry is reciprocated. To be a true rival you must be a direct ongoing threat.
One of the greatest rivalries was the classic Army/Navy football game. Decades ago it was the premier rivalry in the United States due mostly to WWII. After the war and the decline of both schools as football powers it has lost it's status and prominence. It is now relegated to near obscurity. The most current version of the best rivalry belongs to Ohio State/michigan. Some outsiders will claim it is not and offer their version but most rivalries come and go. An example is Oklahoma/Nebraska football back in the seventies and eighties. It was much hyped but the schools now no longer play each other every year. Ah, but the 'Ten Year War' with Woody and Bo established it as the best rivalry in North America as rated by a sporting magazine (sorry, I don't remember which one).
I learned several years ago it's fun to be part of this type of feud as long as you're winning and it's all in good fun. But, when you lose and take it too seriously, it's a sad state of affairs. Good thing for us michigan still sucks!