I agree with the advice so far. It's a little harder for me to calculate as I have a Florida resident rate, which is cheaper...I always purchase the AP, though I've found that I don't need the 'platinum' version - check out the different levels and you can lower the cost if the blackout dates don't affect when you were considering traveling anyway. With the new levels they introduced a few years ago for Florida residents and DVC members, the Platinum Plus with waterparks I don't need, the regular platinum with no blackout dates is closest to the old 'regular' annual pass, but I find the Gold pass saves me a good amount of money and only blacks out a spring break period (in 40+ years I've only been to the parks once in that period), and the last two weeks of December through New Years (I've never been to the parks during that time)...so gold works out ideally. I figure in the range of $110 per day cost against the pass to see how many days you need to go to 'pay' for the pass. Since you only have the standard full annual pass available, you're probably in the range of 9-10 days per year to make it break-even...but I never tried to compare it to discounted hopper passes.
I also dislike the dining plan - I've never used it, and it seems it's not much more than a pre-pay convenience for those who want to see their costs laid out in advance. So many people I know who use them end up trying to pass off snack credits or go to higher-end restaurants just to use up leftover credits. I hate the dining plan for other reasons - as it's made the idea of making same-day reservations at restaurants almost impossible - now with people booking meals 6 months before they even arrive...I miss the days when I'd hit the park in the morning, decide what sounded good for dinner, and hitting the old reservation kiosks in Epcot to book for that evening.