At Animal Kingdom, we absolutely loved Tusker House for breakfast. Plenty of choices, great food and it's a character meal. We were less than impressed with Chef Mickey's when we ate there for dinner. We haven't tried the breakfast there though. Yak & Yeti was also very good at AK.
At Hollywood Studios, I have found 50s Prime Time to be the best out of the options there. However, I would rather just not eat at this park. There are way better choices out there!
At Magic Kingdom, we enjoy Crystal Palace. I have eaten there for both breakfast and dinner. I just wouldn't book more than one buffet for dinner. We found that the food is good but similar from one to the next.
As for counter services, we used to love Pizzfari at AK until they took the chicken parm sandwiches away, lol. However, my daughter likes the pizza there. At MK, we like Pinnochio Village Hous but that is more for the atmosphere than anything. We like the food at Cosmic Rays too. We do not like the counter service at Hollywood Studios. Most days, we prefer to eat lunch at our resort.
Hope this helps!