I hate the following teams so bad:

Texas A&M
Houston Rockets
Houston Astros
Tennessee Titans (because they were the Oilers when I was on my mission)

The two Houston related teams I never developed a hatred for are Rice and the University of Houston. Because they have no fans and I hardly realized that I spent two years within a few miles of them.

I also didn't develop a hate for the Longhorns, but I think it is because the Aggie fans were much more irritating, which created a slight appreciation for the burnt orange.