well if you really want me to vote, i'd vote for the GF every time.
It's my favorite Disney resort. But I wouldn't object to 'having' to stay at any of the resorts, so it's really not all that critical for me.
Each resort has its own advantages and character. Pick out the one you want to try this time and go for it. It will also make a difference as to which ones you can get a good rate at. Not all of them will offer AP rates at the time you're going. For example, AP wasn't available in July at the OKW (but we stayed there anyway, since we wanted a large 2 BR, and it has the largest one on property), but there was an AP rate at the WL concierge (so we stayed there for the part of the trip that OKW wasn't available).
In August, AP rates were available for the WL but not for the GF. In September, AP rates were available for the GF but not for the WL. So it will depend on what's available to you.
Personally, if i have to stay at the BC/YC, I prefer the YC's decor (nautical theme with beautiful wood floors) to that of the BC. But they're basically the same hotel in terms of service, amenities and location.
I prefer the WL over the BC/YC for its overall 'feel'. Plus I very much enjoy taking the boat over to the MK. There is something very relaxing to me about that. I also like the outdoorsy feeling of the WL, vs the more gentry-like feel of the YC/BC. It's really a matter of taste.
In truth, you can't go wrong with whatever you choose. I'd see what rates you can get and then base your decision on that.
just editing my response to add that if your family likes to swim, the YC/BC's main pool is nicer than the WL's. So that might make a difference to you.