You need to decide what things are important to your family.
The BCV has the best pool!! AKV will have the 2nd best pool area!
The BW, BCV and BLT has the best locations to the parks.
BLT has the best location to the MK.
Location is the most important to my family as getting to and from the parks is super easy. Picture this. You are watching Wishes and when everyone makes a mad dash for the exits you can stroll down Main Street, taking in the atmosphere and taking your time. Go have an ice cream or browse the shops, because in only 5 minutes from getting on the monorail you will be home.

Didn't catch the 1st monorail, just wait 5 minutes and another one will be on its way! With the other resorts, you can wait a long time to get on the bus and then have to stand and fall onto people with every turn.

And then if you miss the 1st bus another bus won't be along until another 20+ minutes!!!
Same as above with the BW or BCV except its after you watch Illuminations at the WS. Then if you are at the BW, the night doesn't end. The magicians and BW performers are out, or you can have your hair wrapped or sketches done, etc.
Now the animal kingdom has some pluses too. How cool is it to wake up and see Giraffes in your back yard!
SSR -- do you like shopping and DTD-- well your only 5 minutes away!
VB-- LOVE THE BEACH!!! Nice and relaxing after Disney!
I know, I'm not helping, as there are pluses at every resort.
We own at BLT and BW for the location. We come to Disney mostly every winter so the weather may not be suitable for swimming so the pools, even though they are important to some are not that important to us. But being close to the parks is what does it for me.
Good luck