All personal preference, but for us it would be BWV and it's not even close TBH!
Never stayed at AKV, so I can't speak to that personally, but we've heard great things. Just a little too far removed for us, we've gotten very used to the convenience of places like BWV, BCV, BLT etc... We'll stay out there eventually for sure, probably once our DS is a little older and can really enjoy the safari views.
SSR- Really nice place, no doubt about that. Plenty of friends who LOVE it there... not so much for us lol Again, just personal preference. It's not that we don't like it, but we'd never choose it over BWV (or BCV, BLT, Poly etc...). We've tried figuring out why exactly we don't love it and we're not really sure. I think mostly it goes back to what we said about AKV also, we've gotten so used to the convenience at places like BWV that we are spoiled and don't love having to take buses everywhere like at SSR (granted the convenience to Disney Springs is nice). We've debated whether the overall resort just doesn't appeal to us because it's set after NY and we're from NY, so it feels almost too much like home... don't know to be honest.
All in all, this is an easy decision for us. BWV 10 times out of 10! Location, location, location. Can't beat it! Only places you HAVE to take a bus are DS and AK (for MK you can go through Epcot and take the monorail if you wanted, we enjoy doing this) Plenty of food options (although BWV itself is lacking much QS other than the bakery, there are plenty of options in that loop). Plenty of entertainment options without going into a park. Walking distance to mini-golf. Great pools. Great community hall. We just absolutely love it! By far our favorite.
Love threads like this when we get to see everyone's different preferences and the reasons.