The mainstream AKL and WL resorts are often called "Deluxe Moderates" or "Modeluxes", mainly because their locations put them slightly lower than the rest of the Deluxes, and are thus offered at slightly cheaper rates than the others.
OKW and SSR are in close proximity to DTD, which is desirable to some (was more desirable when PI existed...). Also, if you have your own car/rent a car, they can be more desirable as well as they are condo style and you park near your building, as opposed to the long walks from the parking lot to the resort (I was NOT happy with the parking arrangements at Boardwalk last trip). They are also not shared with the regular resorts and are spread out, so they at least seem less crowded. They also tend to cost less in points.
It all depends on what you want to do the most...if you want to be able to get to the most parks conveniently, BCV/BWV is convenient to both Epcot and DHS. If MK is your thing, then WLV or BLT.