If my top priority was a balcony I would choose AKL Savannah View every time. This is a fabulous resort with stunning views of grazing animals and birds flying. Best place to just sit a live in a world far away.
If I wanted a balcony with some activities to keep me entertained, I would choose the Grand Floridain. The views are lovely, but the lobby is a welcoming retreat where you can relax in an easy chair and watch Brides and wedding parties, listen to music, and stroll around the shops. There is a large balcony on the second floor that is quiet and restful.
If I wanted the chance to wander around, and have street entertainment in the evening as well as a balcony, I would choose the Yacht Club or BWI.