The best restaurant for food, hands down, is Napa Rose. If you have any interest in interacting with the chefs and watching the kitchen, book the Chef's Counter. The chef can create your dining experience based on likes and dislikes and you can talk with them and observe the kitchen while dining. It is a unique experience and the food and service are top notch.
Carthay Circle is in DCA and while I really enjoy the food, the service has been less than stellar every time I have eaten there. I would definitely check out the lounge, though. They have really amazing drinks and cool bites to eat.
Trader Sam's is an excellent little bar at the DLH. They have a tropical drink focus and lots of hidden jokes and gags at this bar. A must visit and the bartenders are awesome! I think some WDW people describe it as a mini-Adventurer's Club.
Storyteller's Cafe is at the Grand Californian. I enjoy this restaurant a lot, but always order off the menu, the buffet is overpriced. The setting is in a gorgeous Craftsman's dining room with huge murals of folk tales and wood carvings. Beautiful spot and the service here has always been good. The food is comfort food with California flair and we always enjoy it. There is a bar inside the lobby for an excellent nightcap in front of a roaring fire.
I love, love the fried chicken dinner at Plaza Inn. It is counter service, but the setting is gorgeous and the chicken is addictive. DH and I split the chicken dinner and both leave stuffed. So good!
Too bad about Blue Bayou, this restaurant has improved in my opinion and the ambiance can't be beat!
For counter service in DCA, I enjoy Boardwalk Pizza and Pasta and Paradise Garden Grill. The outdoor seating area is nicely themed, the chefs make the dishes in front of you, and you get nice silverware. Sometimes they have live music and it is just a great place to relax.
These are my faves off the top of my head!