I'm a grad student at Illinois and finished being an undergrad at Michigan. People ask me from time to time whether I was cool with going to Illinois considering the ongoing Michigan-Illinois rivalry, which I was completely unaware of. Apparently Illinois fans think they have a rivalry with Michigan. One random fellow in a video store told me something along the lines of "we don't like those colors in here". (These are the exceptions, not the rule, over my year here. The remarks also seem to be mainly a way to start a conversation, not a threat or anything.)
My question is, have other Michigan fans had similar experiences going to Big Ten schools that are not Ohio State or Michigan State? And how would you all define a rivalry?
For instance, I'd say that we only have "rivalries" with Ohio State, Michigan State, and Notre Dame, in that order. Does this one-sided definition of rivalry come up a lot for other schools?