We just stayed at BC. It is very pretty, but I felt like I could have been anywhere. I like feeling like I'm in Disney World. Our room needed tons of work. The launches to Epcot and DHS were so appreciated, but the walk to the car or the bus was not. They don't have a decent food court. The little marketplace food area is so limited it is ridiculous. We love the enormous food choices at AoA and POP. All the mods have decent food courts, so if onsite food is important (non reservation) then pick the CBR or CSR. If being immersed in Disney is important, also pick one of those, not BC. Lots of people think that AoA and POP are tacky. We don't. We love AoA. I will say that we never once had to stand on a crowded bus at BC, but we stood lots of times when we stayed at CBR, AoA and POP.
I had always wanted to stay at BC and Poly. Since there were only two of us this trip, and we didn't have to pay for two rooms, we took the opportunity and did a split stay. They are both beautiful, and we enjoyed them, but now we've been there done that and plan to go back to AoA suites, mods, or Doubletree from now on. It just wasn't worth the huge amount of money we had to pay since we are in the room such a small amount of time. We did absolutely love being able to run back to the room to change or rest in such a short amount of time at both BC and particularly Poly.
We used to stay at CBR until it got so dirty. Walking in the room and finding a dead bedbug on the sheets was the last time we stayed there. They are now being refurbed, so we may go back there again soon. We really liked how close it is to DHS and Epcot. The grounds are very pretty and peaceful. It's Disney, without the "in-your-face" of values or the "I could be anywhere along a beach" of BC.
We also couldn't use our Tables in Wonderland at BC or Poly. We were able to use it at POP and AoA which saved us significant money. Also, the marketplace at BC doesn't open until 7 and closes at 11. That's much too late to open and too early to close. We like to get up early and have a relaxing cup of coffee before we hit the parks. We also come in late from the parks and like to run by and get something to drink and maybe a small snack at the food court. We couldn't do that at BC.