Great topic, Taj. I'm surprised to say that, considering the source... ;-)
My two cents: Only one team leads me to act like a fool in public -- the Billikens. (When the Billikens beat Minnesota in the Big Dance a few years back, I jumped up and down so enthusiastically in my office that my downstairs "neighbors" actually poked their heads in our suite, to make sure that someone hadn't been murdered.)
That said, I have lost my voice at Cardinal games...and the Rams can get my blood racing from time to time. And I get this warm feeling in my heart when other "favorite" teams do well -- including a few college b-ball squads. (Any Majerus-coached team, for example... or most other Jesuit schools when they're not playing the Billikens.)
But I don't understand how thicks and others can divide their loyalties between SLU and Mizzou. I believe that thicks is sincere in saying so...I just don't understand it. There's bad blood between the two programs, IMHO. And I usually find that I get that same warm feeling in my heart when Mizzou loses...as when my "second-favorite" teams win.