I got to go with Arkansas/Texas. Even though they have not played each other on a regular baisis in 17,18 years now. The sports announcers try to make Alabama,LSU,and Ole Miss heated rivals,but it doesn't even compare to Texas.The blood runs too deep. Ole Miss right now is pretty hated because of their current head coach,which used to be ours.I'm sure in four or five years when he's gone,it will just be Texas. Who all don't your home town/state like and enjoy rooting against?