I always like to grab Sleepy Hollows for breakfast, Casey's Corner if I want something quick and easy, and Pecos Bill or Columbia Harbor House for something more substantial depending on what I am in the mood for (nachos vs shrimp). However if it's your first time, I'm gonna double recommend Pinocchio's because there's something so quintessentially Disney about it (esp if you can snag a seat that overlooks Small World). It's my favorite place to just pop into and sit for a few minutes! Have fun!
Pecos Bill's Fajitas Platter is a deal! You can easily split 1 between 2 people. It's a lot of food and the toppings bar is vast. Go hungry, my friend.
CHH for sure, with a few exceptions this is the only place we eat in MK. We just aren't that impressed with the TS selection in the park. The resorts on the monorail loop all have good TS choices, you could consider exiting the park and try out one of those eateries. It will take a chunk of time out of touring the park, so there is a trade-off.