Golden Corral (do they have those in the South?).
It has to be a buffet, though. All you can eat.
I think "obsessed" is overstating it a bit. Do we care about our rivals? Obviously. They are our rivals! We want to know what they're up to, what they're thinking, what their moves are/might be, just as one would an opponent in war (albeit not so extreme, obviously). But obsessed? Nah.
Michigan is our historical rival. I think they always will be. In the past, the "obsession" was based on the painful Cooper years. Lately, it's been based on shadenfreude. Now, they have a coach that could bring the competition back, so there's curiosity (combined with the other two).
Michigan State could become a rivalry. I don't think it will ever rise to TTUN levels, but they have, unfortunately, beaten Ohio St more often. I still harbor bitterness from 1998 (not to mention 2015). That, combined with the respect you kinda have to give Dantonio, makes this matchup one to watch every year.
Is there a school that ISN'T "obsessed" with its rival in some manner?
Or lately, shadenfreude. :-)
If I can change sports, and throw in Duke-UNC as a top rivalry, that one is great.
I consider myself very lucky. I grew up going to Ohio State games (4 of The Game, including 2002 and 2006), but went to Duke for my first two years of undergrad (camped out for one Carolina game). I can't imagine any other rivalries topping those two in the respective sports. I actually hate Carolina more than That Team. May the Heels lose every game, forever!
The colors on the ones on the left are problematic. Too close to that school up north.
EDIT: As pointed out below, they rep his high school. I'll make an exception in that case. ;-)