Check out this very interesting polling of Big Ten fans, conducted by SI.com.
-98.2 % of Buckeye fans consider Michigan to be their biggest rival. But only 96.0% of Michigan fans consider OSU to be their biggest rival. This conclusively proves that Buckeyes are smarter than Wolverines (I know, I'm surprised too). But really, how this isn't a clean 100% on both sides is beyond me.
-9.3% of Badger fans consider Michigan to be their biggest rival. But 0.0% of Michigan fans consider Wisconsin to be their biggest rival. This disconnect is amusing to me. In fact 0.2 % of Michigan fans thought Northwestern was a bigger rival than Wisconsin. In the same vein, 1.3% of Minnesota fans think OSU is their biggest rival. We've had historically less success against the Buckeyes than any other Big Ten team. Who are these idiots?
-Northwestern is widely considered to have the most polite fans overall. That's easy though, when nobody shows up for the games. No one there = no one to heckle you.
-Ohio State and Wisconsin consistently shows up in every other teams top 4 for the rudest fans for visitors. Ohio State looks to have Wisconsin beat by a significant margin though...
-Only 2.9% consider Minnesota to have the favorite stadium to visit in the conference. Those are Metro-dump #s. Look for that to climb substantially in the coming years. 'The Bank' is phenomenal.