I can't quite put my finger on it, but I don't really get into them or their performances. It's like they aren't cool enough to be really cool, but they aren't corny enough to be fun either. They are just sort of inbetween corny and cool, and so I don't really find them entertaining.
I think I much prefer the high school marching bands from some small town with a ton of heart, or when the really fancy bands from the Air Force or Marine Corps visit Disneyland and perform. That's entertainment!
The American College Band is just sort of.... bleh.