We've stayed GF-RPC, AKL and BWI.
Our favorite has easily been BWI. At BWI, the staff went out of the way to get to know us and really made our stay magical. One staff member, Jackie, upon finding out where I was from, and being from the same area herself, referred to me not by my name but the name of the town I come from. We thought that Jackie and Scott in particular were great. We love the rooms at BWI, the location, and we lucked out with a Crescent Lake view from our room, so we could see the water from our balcony, and then watch Illuminations from the Club Lounge balcony. We can't wait to get back there in about 7 weeks or so!
RPC at the GF is certainly impressive and beautiful, and the food was great, but we found the staff a little cold. We'd certainly do it again, but prefer BWI.
At AKL, we only did CL for one night, so I don't want to comment much, but the staff was very nice and even left us a lovely anniversary gift. Our only complaint was that the room was (we felt) far too far away from the lounge. We were 2 floors and a very....very long hallway away from the lounge, whereas at BWI and GF, we were no more than a 30 second walk away from the lounge.
As others have said, CL is a really, really nice opportunity if you're lucky enough to be able to take advantage of it. I suppose it can be hit or miss at any resort based upon the daily food offerings, and the staff.
Anyway.....

To answer your simple question simply, our favorite is the Inkeeper's Club at BWI.