I've stayed at all three by renting points. They all have their perks so I guess that how you spend the money depends more on your personal tastes as far as aesthetics go, how much time you want to spend the resort, etc.
I am an animal person, so for me - AKL will always be #1 in my heart. That being said, it is usually the most expensive of the three and it's furthest away from the parks. However, it also has some of the best restaurants on property in Jiko, Boma, and Sanaa, and they offer a TON of on-site activities that cost you nothing to participate in. And if you like that feeling of total seclusion, it won't bother you in the slightest. We had a SV room and they turn the lights off on the savanna at night... it was basically pitch dark and I slept the best I had in, literally, years when we stayed there.
OKW is our go-to resort. It has the cheapest rates but it also has an extremely laid back atmosphere. If you want to lounge by the pool, or at the bar, or spend a fair amount of time in DS, then OKW is the place to go. Plus, Olivia's is a fantastic place to eat! However, we had a lot of issues with the bus service here - They were always 10-15 minutes later than what the monitors said they would be and we would often wait for 30 minutes or longer for a park bus.
BWV was actually the one we enjoyed the least, but that's not to say we wouldn't stay there again. Let me start by saying that the walk to Epcot can not be beat. Hands down, the biggest perk to staying at BWV. They also have a walking path and a boat to DHS but the walk is longer, without much shade, and the boats always seemed to be packed. Epcot is generally where we spend most of our time anyway, so for us it was a perfect location. However, the walks to the rooms can be long (it was a 3 minute walk from the elevator on our floor to our room - which doesn't sound like a long time but when you're exhausted and your feet hurt, it's the longest walk ever). Also, we had asked for a quiet pool room, which would have been perfect because our room was literally over the quiet pool on the DHS side of the resort), except that for some reason there was a landscaping crew down there trimming the hedges at 7am every other day. We stayed there for 5 nights and we saw them three times....Trimming the same hedge. We also had issues with our luggage delivery, and there had been some maintenance items left in the room so they were just sitting in the middle of the floor when we got there. Upon arriving on our first day, I also waited patiently for about 10 minutes at the desk marked "Online Check-In" before someone came over to me and said that I could be helped at the regular Check In desk, but I had to wait at the end of the line which consisted of 4 other families waiting to speak to someone. The resort itself was very nice, but it just wasn't our cup of tea, I guess. I would absolutely stay there again though, just for the proximity to Epcot, especially if you plan to spend a lot of time at the F & W Festival.