Hey again! I just got caught up with your pre-trip and I'm so excited for you and Nick! It sounds like you have another great trip in the works
Since you're up to counter service restaurants, I just had to mention a few. The Magic Kingdom and Epcot have the best counter service

Cosmic Ray's at the Magic Kingdom is our favorite - it's huge in there, there's a ton of good food to choose from, and you get a little show from Sonny Eclipse as you eat

It's a great place. At Epcot we love Sunshine Seasons, the Electric Umbrella and the Liberty Inn. All three have huge seating areas and lots of good food to choose from. And speaking of snacks, we always get food at the Liberty Inn and then run out to the stand around the corner to get fried ice cream and a funnel cake for dessert, which we eat in the air-conditioned comfort of the Liberty Inn. It's one of our favorite traditions
We're never had counter service food at Animal Kingdom, but good counter service at MGM is few and far btween

My brother loves the Back Lot Exress for their veggie wrap, but that's really it. Everything else we've tried hasn't only been nothing special, but it's been gross

Thankfully they have some fun sit-down restaurants!
You also have to get snacks from Goofy's Candy Company at Downtown Disney. You can get three chocolate-covered pretzels for like $2.50. I always get mine dipped in milk chocolate and then covered in m&ms, butterfingers and sprinkles with white-chocolate glaze. The mix of sweet and salty is SO good!