NaSK owned a Sparty sweatshirt and coffee mug when we first met. They have since disappeared (not my doing). He now owns lots of Michigan stuff and became enough of a Michigan hockey fan that he set up BTN+ so we wouldn't miss games.
He didn't have a strong allegiance. His cousin that he lived in front of (rented house from the uncle on the same property) was going to State when we met, so that's where his State stuff came from. He went to Western for a year, then years later went to ITT tech. I honestly wouldn't have cared if he kept the State stuff, as long as it was not out when they play Michigan.
Our only conflict is when the O's play the Tigers, and even then neither of us is a huge baseball fan (even if I did name my dog Camden, so I can have Camden's Yard). I think we're going to an Orioles/Tigers game this year as it will be University of Michigan college night. Possibly baby's first baseball game...I'll have to buy her some Orioles gear to wear.