If I could go back to anywhere we had been it would be Flying Fish. If I only had one meal and I could pick anywhere in WDW, I'd probably pick Le Bistro (for the fancy factor) or Sci-Fi (for the fun, nostalgia factor).
Ohana. I don't know about you but not only do we love the food and drinks, but if we can see Wishes from our table - even better. Plus, where in the real world can you have a meal like that?