3522, 6500, 5506, 5500, 4506, 4500, 3506, 3500, 5518, 4518, 3518
My preference is a Paradise Pier view, and don't like looking at the Pool.
3522 is directly below the Grand Villa, and should have a good angle for World of Color.
6500 is one of the few villas on the 6th floor, but is next to public viewing platform.
5506 has a slightly better angle to World of Color than 5500.
4506, 4500, 3506, 3500 I would not request below the third floor.
5518, 4518, 3518 are Challenge Trail view.
Memorial Day should be a great time to visit. All the construction near the villas will be done, and if you are lucky maybe a soft-opening of Little Mermaid or Star Tours