When I recently made the move to Orlando the most essential addition to my move budget was the cost of my AP. This was true if, for no other reason, the number of visitors that are planning to come down to see me. My boyfriend, my mom, my sister, my dad, friends, other family.... we're all Disney nuts in varying extremes and I knew that their trips would not be complete without at least a day or two in the World. I bought the pass a little under a month ago, and next weekend it was already be getting it's 3rd use. The cost of admission made the pass an obvious purchase for me, with the free parking and discounts an definite plus, as well.
Also, being here for such a short time I don't know many people and while I don't plan on visiting the parks on my own, I am looking forward to spending an afternoon in Epcot wandering through the countries to pick up Christmas gifts. It's one stop shopping! And I certainly wouldn't be planning that if I was wasting a day's admission just to shop.