You'll also be better off choosing your own stateroom. Look at deck plans and try to avoid staterooms directly above or below theaters, restaurants, pool decks, etc. The best stateroom decks are ones sandwiched between other stateroom decks, with no guest activity areas above or below.
Also, on Disney deck plans you'll notice some large empty spaces. Those are crew galley areas, which you'll also want to try to avoid due to noise and service carts sometimes clogging the nearby hallway area.
Far aft areas can get engine noise and vibrations, and far forward areas get a lot of movement, which makes midship ideal.