What kind of food do you enjoy? While I agree that in most of the park the counter service food can be a little repetitive, there are some stand-out places.
In Magic Kingdom, the offerings are a combination of hot dogs, burgers, chicken sandwiches and salads, and flatbread sandwiches. Casey's Corner, Cosmic Ray's, Pecos Bill's, and Golden Oak Outpost has a wide variety of stuff like that. Liberty Tree Tavern is my personal favorite, but that's because I'm vegetarian and like the hummus sandwich and vegetarian chili. They also serve tuna and other fish-type offerings there, too, though, and their offerings tend to be different than what you'd find elsewhere (e.g. sunflower seeds on the salad). The Lunching Pad in Tomorrowland also has new super-deluxe hot dogs with toppings, like the Philly Cheese Steak Hot Dog.
If you like a good variety of foods, there are lots of great counter-service options in Epcot that break away from the norm. Tangeriene Cafe has great Schwarma or veggie platters with chicken, lamb, couscous, tabouleh, hummus--and some add up to upwards of $14! They're a great bargain on the QSDP. Sunshine Seasons also has a wonderful variety of food and desserts, with Asian Noodle Bowls, salads with roasted beets and goat's cheese-- it's a great place for quick service variety and delicious desserts.
Hollywood Studios isn't great for counter service, but the basic burgers and salads have a slightly more sophisticated take on them here. I like Backlot Express. There was a really yummy veggie flatbread sandwich there with asiago, but again, that's just me. You can also get a Southwest Chicken Salad there, and that's kind of different. You can get BBQ Pulled Pork at Fairfax Fare.
Animal Kingdom has yummy BBQ at Flametree Barbecue, and Yak and Yeti Counter Service (I think it's call Anandapur Local Cafes) has a great, more Asian inspired menu that is served in little Chinese take-out boxes. So there's definitely some more variety there.
Of course, this doesn't even begin to get into all of the other things you can get at Downtown Disney and your resort. You can get some GREAT, GREAT counter-service food at Wolfgang Puck Express--pastas, fresh-made individual pizzas, soups, pasta. You can also get rotisserie chicken at at Pollo Campero.
I'm not sure where you will be staying, but the quick service dining at Pop Century is supposed to be really, really great, with a solid variety.