My 2 cents.... I would base the decision on themeing. I wouldn't choose to stay at VWL if it were a 2 minute walk to Magic Kingdom just because I am not a dark decor, woodsy, outdoor type of person. Some people love this type of theming, its just not for me. BWV, BCV and OKW all have a brighter themeing. OKW is quiet and on a golf course, all the villas are in seperate buildings with their own entrances and some can be quite a distance from the main check-in building. BWV and BCV (as well as WLV) are all in deluxe resort type hallway buildings. BWV and BCV is within walking distance to each other. BWV is a bit busier then BCV since is is right on the Boardwalk. My personal favorite is BCV since it has the brighter decor and it is a bit quieter but still within walking distance to Epcot, Boardwalk and MGM. (Just want to reiterate these are all my opinions)
After you choose which theme you prefer then you need to decide what type of accomidations you want. A studio sleeps up to 4 and is a bit bigger then a regular deluxe resort room with a mini fridge and a microwave. A 1 bedroom also sleeps up to 4 has a master bedroom with king size bed and jacuzzi tub and a second room with a pull-out couch living room area, kitchen with stove, fridge, micro, and dishwasher and also a stackable washer and dryer. If you really want to spluge you can get a 2 bedroom which is like a one bedroom but with another room attached that has 2 beds in it, this way the kids don't have to sleep on the pull out in the living room. (This is what we do, we have a 6 year old son and a 5 year old daughter)