Seems to be the consensus on the boards these days, so allow me to get the ball rolling...
I can't stand their "I'm smarter than you, let me tell you all about it" manager
I can't stand their roid-monkey hitting coach
I can't stand their prissy crybaby ace
I can't stand their Bald Bull-looking, Reds-pitching feasting slugger
I can't stand the way they pick pitchers off the scrap heap and instantly turn them into the second coming of Cy friggin' Young
I can't stand the "Best fans in baseball" crap
I think I loathe them more than the sCrubs. At least those losers haven't won anything in over 100 years.
Sorry, had to vent a bit.