I think it has alot to do with peoples personal preferences........
I had orginally looked into
DVC when the only WDW DVC property that existed was OKW and I knew this was not for me. I love the larger 1 BR at OKW but the location, the condo style feeling of the resort, lack of restaurants, lack of nighttime activity, the bus only transportation, etc. was just not for me. Since I go to WDW 3-4 times a year, buying a DVC membership at a non WDW property was never a consideration, so after my initial look-see at OKW, I just thought a DVC membership was not meant to be. Then BWV was built and even then I was not an immediate sell. However, when I first visited BWV, during a WDW trip when we were staying at YC, I knew this was for me! I returned home and within months I bought my DVC membership with my home resort at BWV. I have not regretted it for a single second!
I love the fact that with a DVC membership I can choose to stay at other DVC resorts and have done so in the past and enjoyed my stay. This is a definite plus of a DVC membership and a plus that sold me on buying a DVC membership and also a plus that I intend to take advantage of to visit VB, HH, etc. But if I buy additional points or another contract it will be either at BWV, BCV or VWL(unless Disney builds additional DVC resorts that are similiar to these 3). I like being in the locations where there are parks within walking distance or a boat ride away, a variety of restaurants to choose from, room service, valet parking, an enhanced pool, etc. From my experiences with booking through member services BWV & VWL are not so easy to get reservations at, so since I prefer these locations/atmosphere I would want additional points/contracts here. Of course if I got a super duper deal at OKW, then I am sure I could get real good at booking at 11 months and switching resorts at the 7 month window. But why make life more difficult than it has to be????