Lots of animosity between AJ and his teammates last year- I've heard from a number of people inside the WSox that that was one of the key drivers to not re-signing him.
I recall several on field "disagreements" between AJ & Peavy, Konerko, etc.. I think it's very telling that AJ could even think that the WSox would throw at him- unless it's all bluster/showmanship. He sure wasn't moving away from the pitch when he got hit.
The interaction between him and PK was interesting- looked like Paulie was laughing, then talking with his glove covering his face.
AJ- the "Bill Laimbeer" of MLB.