I've only stayed at OKW, BLT, and BWV with a trip planned to BCV. I've also stayed at the WL, but never the villa part. Like PP said they all have their good/bad points.
OKW - very spacious room, quiet - for the most part. But they're also very spread out, and kind of far away from all the parks. Some of the rooms can be a little noisy if you're too close to the roads nearby. We also had a large group that were playing golf outside our room one morning that were so loud they woke me up. I wouldn't have minded at all, but they really seem to just hang out right outside our room and not move forward.
BWV - great location, walking distance to 2 parks, there is also a great atmosphere at night on the boardwalk. There is a lot of TS locations to choose from, but QS is definitely lacking here. The nice part is that if you have park hoppers you could head into Epcot and eat at one of the many QS locations here.
BLT - AWESOME location, and I loved the deck to view fireworks. Only
DVC members staying on points are allowed to go up there. There are a few faults, like the rooms are one of the smallest floor plans for DVC. I also really loved the decor here, and for some this might not be a big deal at all, but I was constantly worried about my 1 year old slamming his fingers in the sliding doors on the bathroom that he just loved to play with. If I didn't have a little one with me, this wouldn't have even crossed my mind.
None of them had all that impressive pools, but BLT did have a zero entry as well as a splash pad that my son just LOVED.
As for where we are going to be staying....
BCV - we chose bc of the location. again so close to 2 parks, only bad thing is that they don't offer grandvillas, which we normally get. Since there is a smaller group of us going this time we're doing 2 bedrooms instead. And probably the main reason we choose BCV is Stormalong Bay! It looks amazing, and our kids are fish at heart.
As for VWL, again I haven't stayed at the villas, but the pool here is really great too, as well as the atmosphere. I thought the main lobby was amazing and I loved the creek that emptied out into the pool, a great design.