Our Family has been staying at ASMusic since 1995. New back then.
We have always stayed in the Calypso Buildings ( #1, #10) - As the family grow from 3 to5, we have opted for the new family suite- twice the space, twice the bathrooms and private parents room- (at twice the cost, but that is because Disney doesn't offer you a connecting room for $25 anymore).
The Preferred rooms (Calypso) are close to parking, bus, main building, pool, shops, food court and activities.
Ground floor - pool side is best for us- no stairs and excellent access to the pool and other amenities I mentioned.
But I am, and have always been a Disney junkie so to speak. We have stayed at other Disney properties, but always go back to ASMusic.
DD has a cheer competition in march and they are staying at Movies- DW wants to stay there too, but I am trying to talk her into ASMusic. It is just the two of us in a room this time, since the other kids are in college and only the youngest is going but staying with her cheer team- they will be at ASMovies- so beware- cheerleaders on the loose.
IF you are like us, we are at the park for rope drop and stay till all the rides are closed and we have nothing to do but leave, the ground floor room is nice then, no stairs. If you are wasting time at the pool, the ground floor is still nice. IF you come back early and just want to hang- the ground floor is great- all the in and out traffic to the main building and back will add to all the foot traffic you did in the park- sit and relax by the pool (and your room) with a drink (beverage).
Nice music and great environment.
Hope this helps!