For fancy, couples, romantic-type dinners I'd choose Victoria & Alberts.
For a fancy place a family could enjoy, I'd choose California Grille.
But out favorite place -- the place we have to visit EVERY time -- is without a doubt, O'hana. We've never once been sorry we've eaten there. Always fun. Alway good food. Great for couples. Great for families. Just great! And if you can, book for about 30 minutes to an hour before the fireworks at MK and when you check-in at the podium as for a window seat. What a magical way to end a vacation!