It really is all about what you want out of your trip.
The Value resorts are very nice, spotlessly clean, and have fun food courts and pools. There are busses to take you to all the theme parks and you can park near your room if you have a car.
The moderates have great landscaping, upgraded pools with slides, and, usually, a sit down restaurant option. You get the same bus transportation and parking near the room. The rooms themselves are a little larger and POR can sleep 5.
The Deluxe resorts have incredible theming, room service, multiple restaurants, great pools, and indoor corridors so your view out the window is all yours without folks walking past. Most can sleep 5 as the rooms tend to be much larger. There are also more view options like the savannah view at AKL. Most Deluxes have transportation options like walk to, boat or monorail access to at least 1 park and busses to the others.
You just need to figure out which options are worth the money to you, they are all great and the Disney magic won't end whether you go back to POP or the Poly. Once you pick a level, choose the resort with your favorite theme or the one closest to the park you will use the most.
