As pp said, it is all person preference.
It depends on what you´re looking for. OKW is a lovely resort with a huge GV for less points than the other ones. When I am deciding which resort, I look at what the resort has to offer in terms of restaurants and the atmosphere and design of the resort and rooms. I loved Jambo´s GV interior, but felt caged into the resort since there were not walking paths compared to OKW or other places.
If you are spending a lot time at MK, then that would be a good choice because of the location. We don´t care for the resort, so we would choose CCV for their GV instead of BLT.
My advice is to look at a lot of pictures of both of the resorts you want and see which one speaks to you.