Each
DVC has something special to offer. Unless you are very attached to the idea of staying in a specific resort every vacation and plan to travel during peak travel times (Christmas week, Thanksgiving, Easter, Food & Wine (mostly for the Epcot area resorts), then I'd suggest you purchase where you can get the best deal.
IMHO, here are some of the pros and cons of each Disney-area resort:
OKW: Pros - larger rooms, cheaper point use per. stay, quiet & laid-back atmosphere.
Cons - no indoor seating for CS, more remote location
BCV: Pros - access to SAB pool, walking access to EPCOT
Cons - expensive per. stay points-wise, no community hall, shares bus w/other resorts
BWV: Pros - whimsical theme, walking access to EPCOT, standard view rooms are a bargain points-wise, boardwalk view rooms available
Cons - shares bus with other resorts
WLV: Pros - fabulously carried-out theme, ferry to MK, very good dining on-site
Cons - woodsy "dark" decor and views are not everyone's cup of tea, pool slide is on the smallish side according to DS10, no grand villas
SSR: Pros - 12 extra contract years, walking access to (and available views of) DTD, zero-depth entry pool with toddler friendly water play area & slide
Cons - the least whimsical/clever in theme of all the DVC resorts
Specualtion on The Future VAKL
Pros - rumored to have larger rooms that accomodate more guests, very good dining at AKL, rumored savanna views, longer contract
Cons - will likely be more expensive per point, remote location, may have more expensive annual dues to cover savannah costs.