Of the villas on your list, we've stayed at BCV, BWV, and SSR. (We hope to try OKW at some point, but honestly, it is fairly low on our list of places we want to stay.) We knew we wanted to buy either at either BWV or BCV because we knew we wanted to own at an Epcot resort, particularly because we love F&W.
I slightly preferred BCV, my DH slightly preferred BWV. We bought at BWV and have never regretted it. We love getting the Boardwalk view rooms, which really, you're only likely to get if you're an owner much of the year. We generally walk to both Epcot and DHS when we stay there, which really makes up appreciate the location. My only regret at all is that we haven't been able to book BCV very often, because we do love stormalong bay.
We are considering adding on at SSR, because the price is so good, and we might want to get a treehouse occasionally. I can certainly see the temptation to purchase there. A fair number of people on these boards seem to dislike it, but honestly, we had a very nice stay there. My DM and DSF did a no park, all downtown disney and golf trip, and really liked it. I wouldn't want to stay there every trip, but we have considered adding on a small contract there.
There are good things about all the
DVC resorts, or at least all the ones we've stayed at so far. We chose to buy BWV, and we love it. We made the right choice for us when we bought it. We're currently trying to decide where and when to do an add-on. We own at AKV and BWV, so we're considering SSR (for price and treehouses), BLT (for location), or waiting and seeing if they build GFV.