I love them all so it's a hard choice, but I loved the Poly, being on the monorail loop is the best, especially with little ones in a stroller. I love POFQ. That's our first pick based on price. And then this past December I stayed at the cabins at Fort Wilderness and I fell in love with them. The only downside to Ft Wilderness is if we didn't have a golf cart and had to wait on the internal buses all the time, I dont think i'd have liked it as much, but renting the golf cart adds alot of money to your trip.
Now those are my choices based on where I have stayed, which have been: Contemp, Poly, POFQ, AKL, Ft Wilderness Cabins, CBR, CSR, ASMusic, ASMovies, Pop, Dolphin. I'd have to say the beach club would probably be one of my fav's if I ever stayed there.