We've been frequent WDW guests over the past 5 yrs. Our latest "FAV" character meal with great food is CP at MK. We've been there twice in the past 4 months and have really enjoyed the food and the characters. And, honestly, we do prefer Mickey and friends, but Pooh and friends is a nice change especially with the awesome food!
We used to love GG but they changed it twice in the past year-they kinda tried to fix something that wasn't broken, ok, maybe it needed a bit of rehab as far as the restaurant went but the food was fine and they changed it...twice, and it's still not as good as it was 2 years ago. It's just been a bit disappointing to us and others we know who have enjoyed it in the past before the changes.
LTT wasn't bad for dinner, but it seemed to take quite a long time (1 1/2 to 2 hrs for just myself and dd). I don't have a favorite for dinner as our experiences with character dinners haven't been too good. 1900 PK Fare was way over rated (food fair, character interaction rushed). CM's which we have tried many times just seems to be average at best as far as the food goes although a great selection of characters. GG was a favorite before the changes. We still have yet to try CP for dinner, but like I said, we love their lunch.