My vote is for CBR. I've only stayed at POFQ & CBR. However, this past trip, we did not choose CSR, because when I looked at the website for Disney, that music actually drove me crazy. Also, it seemed that CBR is more centrally located to MGM & Epcot, whereas CSR is closer to AK. We planned to visit Epcot & MGM the most of all the parks. We only went to AK once, but actually went to Epcot, MGM & MK more than once each.
I just felt like the tropical theme was more relaxing to me that the Southwestern theme.
We liked CBR better than POFQ because although it is more spread out, with proper room placement, we were actually closer to our car and MUCH closer to the bus stop than when at POFQ. We were only about a 5 min. walk from the main pool and food court area. We were VERY close to a quiet pool and liked that aspect as well, since the main pool area is so noisy (same at POFQ, which has no quiet pools.)
Last year, I originally wanted to stay at POR, but switched to POFQ at the last minute b/c of the size, b/c I wanted a Mansion room at POR and knew that was not guaranteed; b/c no kings were available at POR but POFQ had some come available, etc.
For me, the only advantage of POR/POFQ over CBR was the boat-ride to Downtown Disney.
I do think we'll try CSR in the future, and POR, but probably on split stays, possibly with deluxes.