The character meals are limited in MK, we always do the Crystal Palace as our arrival night dinner, and usually also do breakfast there. We don't mind the same characters.
For counter service we like Columbia Harbour House. We no longer go to Cosmic Rays, we've had trouble getting a table there and it's annoying to have to wait on different lines if one person wants a hamburger, one chicken, etc.. The lines are split up by food items.
I do like Liberty Tree Tavern but we stopped going there once they stopped having the characters.
In Animal Kingdom we always do breakfast as Tusker House.
Our favorites in Epcot are Chefs de France and Biergarten.
In DHS we just do counter service usually, we've not had good luck with TS there.
Next trip we plan to try a couple new places, Coral Reef and Captain Grill.
Out of the parks we like Kona and 1900 Park Faire. Chef Mickey's was not our favorite.