We stayed in the Boca Chica building in a garden view room. The view was beautiful! I've read that most the garden view rooms have nice views with the exception of a few that have obstructed views due to a pool house building. The rooms with obstructed views would most likely be ground floor rooms in some areas of Big Pine Key and Boca Chica. Check out the Grand Floridian grounds map to see what I mean. I wouldn't suggest a particular building. I would just request a room with a nice view when making room requests. That gives them more leverage to pick a nice view for you, rather than having to stick with one building. What are you looking for in a room? View or proximity to the main building, monorail and restaurants? If it is proximity to the action, Sago, Big Pine, and Boca Chica are about the same (Big Pine probably slightly closer) while Conch Key would require a bit more walking, but it's close to the boat dock to MK.