I've had the pleasure of eating in every restaurant in DLP, as well as many in
Disneyland and WDW (and around the globe). We are foodies, and DLP does ok.
For the very best, go to the California Grill (Disney's 4th best restaurant world wide and Paris's best). Great food, great wine list, great views, great service. Highly recommended.
Next fav is the Steakhouse in the Village - really good food and service at a fair price. After 8 meals there, I have not been disappointed.
Next is the Silver Spur - 12 meals here, all good quality, service (like all DLP park restaurants) is variable.
Then The Yacht Club at NBC - great steak and seafood options, good service.
Then Walt's - great setting, good food usually, service dramatically varies, but poor more often than not. The food and setting compensate.
Annette's - fun and good value (not great gastronomy but great junk food and sometimes fun entertaining service).
King Ludwigs - good food, great setting, fair prices, poor service.
For buffet's Plaza Gardens, Inventions (a great character buffet at the DLH including Lobster), and Le Grange (Tex Mex at Billy Bob's Saloon).
Rain Forest Cafe - good food, fun environment, poor service and expensive.
All the others are poor or have been ruined, quality suffering, dumbed down.
Blue Lagoon - 5 poor meals - cold, bad quality, friend got food poisoning, and have seen mice and rats in the dining area. Great setting, but you cannot pay me to eat there.
Auberge is ok quality, poor service and highly overpriced.
(Lamenting the loss of Manhatten Jazz Club and the Hunter's Grill - they used to be awesome, but not longer).
If willing to go off site, the restaurants in Val d Europe are great too - Indian, Middle Eastern, Chinese, Italian, French, Spanish, Steaks - just a short train journey (2 min) and much cheaper.