Anyhow, the thing about theory is you have to understand that no matter what kind of music you're writing (except, like, grindcore, but that isn't music), you are slave to theory, and that's NOT a bad thing. Everyone is confined by music theory whether or not they wish to admit it, and everyone sticks to the "rules" whether or not they know it. Knowing it, however, is a powerful thing, and the greatest minds in western music of the past half millenia were all masters of it. As Frank Zappa said, "All the great music has already been written by men with wigs."