You'll get a variety of opinions on here for a variety of reasons!
My personal favorite is the 50's section (bldgs 1 or 3). It is close to Classic Hall & the bus stops and is pretty quiet which is important to me. I also love the fact that it is fairly convenient to RAC & luggage assistance on checkout day!!! I have been a solo traveler (for all intents and purposes....when visiting DD she has to stick to her work schedule so I can't count on her to be there at check out time!) several times this year so it works exceptionally well for me!!! My second favorite section is the 60's! It's a close second to the 50's but I only like lakeview in the 60's...poolview is too noisy for me. But lakeview is quiet and just lovely!! Also close to Classic Hall & the bus stops!!
Hope you have a great trip and You will Love POP! Be sure to check out the shadow boxes in the lobby and watch the CMs (or join in if you so desire!) do the Hustle in the food court at 6pm! It's so much fun there!!