My vote is for Caribbean Beach Resort, hands down.
The DH and I stayed there this past September, and LOVED it. If it weren't for him having his heart set on staying at the Wilderness Lodge, we would definitely have booked CBR again.
The overall theme and beauty of CBR just can't be beat. Not to mention the value. The food court was great with lots of variety. The main pool was a lot of fun, and the quiet pools were nice as well. The buses ran frequently, and we never had to wait very long.
We really loved the island theme, and Disney does an awesome job of replicating it...we definitely felt as though we were in the Caribbean!