Although it wasn't a deciding factor by any means, HHI and VB were resorts that I'm glad are there and made the purchase even more attractive. In fact, the trip we toured
DVC (and bought after getting home) was a split stay, 4 nights at Coronado Springs, 3 nights at a Cocoa Beach rental. Hearing that VB would be another option if we wanted a split stay involving some beach time was nice. AUL sounds cool, in theory, but for us living on the East Coast, it is such a LONG trip to Hawaii.
All that said, if VB/HHI/AUL didn't exist, would we have skipped on DVC? Probably not.