At BWV, best rooms are those overlooking the boardwalk as you can see Spaceship Earth and watch the fireworks portion of Illuminations from there besides having an excellent view of the entire lake where the Epcot resorts are. Boardwalk views make up about 15% of the total rooms.
BWV has standard and preferred view. The standard views are actually OK. The worst views there are actually a handful of preferred view rooms. One of the preferred views is Luna Park (where the main pool is). Near the pool is Leaping Horse Libations, a fairly large and high carousel shaped bar and concession stand. There is a small group of rooms with a view of basically that structure and thus cannot see much else because it blocks the view. Do not know the room numbers.