Being the bargain hunter that I am, we got the USF AP, because WDW AP prices were becoming ridiculous. I figured, well, any park will do. Much to my surprise, we find that we enjoy USF/IOA so much, a trip to Orlando would not be complete without it. We usually spend 3 days there also, and then go to DVC for 6 days.
We also really enjoy staying in the USF hotels. I enjoy them more than the Disney hotels (but not the DVC!)