It all depends on what you think you want....
Some people like close to the elevator, but those rooms have balconies that overlook the valet area - not a particularly pleasant view IMHO
I always prefer a high floor, but again, JMO
Personally, I like the "pond view" 3rd. 4th or 5th floor -Not sure the reservationists really know what the pond view is.... I can't recall the room numbers offhand
If you request farthest from the elevator - hgih floor, you will likely be able to see the few fireworks that are launched during fantasmic at DHW - but your view will be either full parking lot - or part parking lot and part walkway to DHS
One of my best rooms was a 3rd floor - looking right out at the pond. it was a bit of a hike from the elevator, but had a nice view of the pond, and I would just drop down the two flight of stairs and walk right out to the are by the quiet pool. I would almost never enter view the lobby, but would instead walk around to the quiet pool and take the stairs up.