I didn't know the hotel offered a choice. I thought they gave your theme park view request as whatever is available. We stayed in a room last year just to the right of the GC's entrance into CA....overlooking Grizzly Run, and to the left, Soarin'. We loved it. It seemed as though we were right in the park. The rooms that look over toward Paradise Pier are much further away from the park...makes it seem as though you're looking at Paradise Pier through a camera. (Does that make sense?) Our room, even at night, was very quiet. We had friends that had a courtyard view (they hated it) and others who overlooked Downtown Disney...again, they didn't like that....couldn't go out on the balcony (no privacy) and they said it was noisy.
Hope this helps a little. By the way, does the GC offer a choice of theme park views when booking??