@Shaft41
lots of great recommendations so far, and I'll echo a few here. So for me:
MK:
Pecos Bills—Mainly a sentimental favorite b/c I use to work there. And while it was a must do each trip for that, I was very happily surprised with their revamped menu. The fajita platter was very large and really good.
Very Honorable mention: Columbia Harbor House. Really great classic meals and one of the best places to go when you want to sit and get off your feet. The 2nd floor is hardly ever full.
Guilty Pleasure: Casey Jrs. The hot dogs are huuuge and covered in lots of sloppy deliciousness.
Epcot:
In Future World: Sunshine Seasons at the Land pavilion. Huge menu with lots of hearty meals to choose from.
In World Showcase: UK's Yorkshire's Fish and Chips: May not be the best, but i'm a sucker for F&C b/c seafood is something we don't make at home (I'm the only one who likes it)
Tangerine Cafe (Morocco) Again, I'm the only one who like Mediterranean food (I know boring family), so while I'm on a World (Showcase) Tour, I eat what I can't get otherwise.
However, look for Choza de Margarita to open in Mexico this year—Tacos, Empanadas, etc.
Studios:
your right, not a whole lot here that's overly original especially with all the closures recently. But:
Rosie's All American is a decent place for burgers.
Fairfax Fare has some BBQ
And when I was there last there was a small collection of Food and Wine-type carts behind Dinosaur Gerty that had some unique, rotating meals.
Animal Kingdom:
Flame Tree BBQ and Yak and Yeti counter are you best bests here.