As far as where we ate...
Magic Kingdom~ Crystal Palace, Cosmic Rays, Pinocchio Haus, Pecos Bill
I did enjoy the chicken at Cosmic Rays and DH has a taco bowl at Pecos that he raved about.
Epcot~ Electric Umbrella, Liberty Inn and funnel cake ( those were delicious

)
DHS~ Hollywood and Vine, Toy Story Pizza Planet, and hot dogs some place but I can't remember where
AK~ Pizzafari, Flame Tree BBQ
I did enjoy Flame Tree
Also ate at Chef Mickey's which was just beyond horrible! Worth the price for the characters though. And also at POP food court a few times.
I am a picky eater... and I will admit that. I don't like ethnic foods for the most part. No asian, mexican, seafood, etc. So typical american food is what I like. Good steak, potatoes, hamburgers, chicken, pizza,etc. The buns of the burgers and hot dogs tasted weird to me. The pizza was tolerable but not a favorite. The "prime rib" ( if that's what they want to call it) at the buffet's was just plain awful.
I would love any suggestions you guys could give me.
Some suggestions:
Magic Kingdom - Main Street Bakery cannot be beat for counter service. Sandwiches and to-die-for pastries, what's not to like? If you like fish, you might also enjoy Columbia Harbour House, which is basically a fish/chicken & chips place.
Since you like simpler fare, I'd suggest the Plaza as a good sit-down option. They're mainly a sandwiches and ice cream type place, with an absolutely fabulous reuben, excellent club sandwich, great fries, etc. and GIANT, classic ice cream desserts like brownie sundaes and banana splits. Liberty Tree Tavern might also be a good sitdown choice, since it is very American, Thanksgiving type food.
The places you ate at MK were basically our list of least favorites, other than Crystal Palace which we haven't tried. There are better options, but they're easily overlooked.
Epcot -
When it comes to counter service, there's no question in my mind - Sunshine Seasons, in the building with Soarin'. They have a great selection of choices from rotisserie chicken to sushi, and some of the best counter service desserts anywhere at Disney.
Table service choices are a bit tougher since you don't care for ethnic food. Most of our favorites are the more exotic World Showcase options, but Coral Reef has good seafood and steaks and a wonderful atmosphere with the aquarium wall. Le Cellier is a steakhouse, which sounds like it would be perfect for you and your family, but the ADR is one of the tougher ones to get so plan ahead!
Hollywood Studios -
The pickins here are pretty slim. We try not to eat counter service here, because we don't especially care for any of the choices. Pizza Planet is acceptable but not great and the kids like Toluca Turkey Legs, but there's nothing I'd really recommend other than to eat before you come or do what we do and have a sit-down lunch and go elsewhere for dinner.
When it comes to table service, there are a couple of simple, American choices. Prime Time's menu is very homestyle - meatloaf, fried chicken, etc. - but we've never been because I'm not into the whole theme of teasing from the waitstaff and all that. Sci-Fi has burgers and ribs and is just okay (great onion rings and milkshakes, tho!), but well worth doing for the atmosphere in our opinion. It isn't every day you can eat in a car-table under the "stars" at a drive-in!
Animal Kingdom -
Again, not many choices if you don't care for ethnic food. Flame Tree is definitely the best counter service the park has to offer, and there's no non-ethnic table service option at all. Since the park closes early, this is a good night to try a resort restaurant for dinner.
Resorts -
Beaches & Cream at the Beach Club has great, simple food and awesome desserts, but doesn't take ADRs so can be a pain to get into.
ESPN Club has typical sports bar food, awesome nachos and hot wings, good burgers.
Whispering Canyon at the Wilderness Lodge has a western/American menu, but I've never eaten there so I can't give any first hand opinion. It gets great reviews here on the DIS, tho, and might be worth a try if you don't mind the rowdy-ish atmosphere.
And if you're interested in a really nice meal, Yachtsman Steakhouse at the Yacht Club is expensive but excellent for steak lovers.