Ditto on Blue Bayou -- that is definitely a PS you should make from home as early as possible. It is truly a unique atmosphere, and the food is quite good too. My favorites are the calamari appetizer and the prime rib. Next time I will try the Monte Cristo sandwich.
During my last stay we had sit down meals at the following:
ESPN in DD - for us, this was just "okay." We didn't feel the service was that great, and when we had to put our names down to wait for a table, they said we had to leave either a credit card or our driver's license, which I thought was strange. The portions were huge, but as far as taste, again it was just "okay." I would rather go to Rainforest Cafe.
Storyteller's Cafe in GC - we REALLY liked this place a lot. We had two meals here, the breakfast buffet, and dinner off the menu (there is also a dinner buffet). BF had ribs which he thoroughly enjoyed, and I just ordered a salad and the corn chowder because I wanted to eat light, but boy was it good! The corn chowder really is to die for!
Hook's Pointe in DLH - again, we really liked it here. Even the bread was unique, interesting, and tasty. I had the scallops, and BF had some kind of pork chop or pork loin. Both were very good.
Naples in DD - we liked this a lot too, and it was pretty reasonably priced. BF had a pizza, which we really could have shared, and I had the lasagna. We ended up taking the leftover pizza with us for a snack later.