I love food... so my vote is for all of it!!
But the two meals that stand out the most for me, that I will definitely repeat, are dinner at the California Grill (top of the Contemporary) timed to coincide with the evening fireworks (mmmmm sashimi! And the fireworks were breathtaking from there!) and early breakfast before opening hours at Crystal Palace, Magic Kingdom, so you get to wander up a deserted Main St (and the buffet/characters are great). Both experiences were absolutely magical.
Third runner up would be the dessert party also on a fireworks night, was great to get a closer view (though if I had to choose, I'd still pick the CG view) and the desserts were DIVINE!