There is one MAJOR exception to that. Ohio St. vs UM, now those two really do HATE each other. Most Buckeye fans can't even bring themselves to say the word Michigan, to quote Woody, "it's that state up north."
I've always cheered big 12 when they were playing out of conference...with the exception of CU...never once have I, or will I, ever root for CU...but I will continue to root for a lot of the big 12 teams, and now our new conference bretheren lol
DT