I have stayed at all 4 values. It depends on the people with you. When I used to bring my godson (he was between 4-8 at the times we went), he loved the movies followed by sports. He liked movies more, but knew that sports had the better seats for the buses.
Before bringing him, adults only, we preferred Music - as it was quieter.
My 3 YO DD has been to sports, because of the buses and wanting a seat when holding a 10 mo old. Then at 22 mos, we went to POP, because she loved bowling pins. Now, POP is it, we haven't moved! Havnig the bus for the individual resort works out better with a carriage. We can let people go ahead of us and wait for the next bus and be assured a seat - where as you can't be assured of a seat when you are bus stop two or three at AS.
We had a group with us one year that was staying in Movies, but was in the Mighty Ducks, and found it was easier to walk over to the Music just to get the bus. That's also something to consider with adults. I think it's too much with kids though.