MGM-Backlot Express was pretty disgusting, the hot dogs were awful and we normally love each and every WDW hot dog!
ABC Commissary is good for the fish and chips and the air conditioning.

We like to go to the stands on Sunset Blvd. for the chili dogs.
AK-Haven't tried anything bad here, but as far as looking bad, the pizza at Pizzafari looks (and smells!) kinda icky.
Tusker House is our absolute favorite place to eat. For breakfast don't miss the awesome potatoes. For lunch or dinner the salmon is great.
MK-Didn't like the cheesesteak sub at Cosmic Ray's. It needed LOTS of ketchup to be able to eat it!
There are lots of good places. We love the hot dogs at Caseys, the Figaro Fries at Pinnochio Village House, the fish at Colombia Harbor House, and the topping bar at Pecos Bill.
Epcot-I'm not crazy about the Chinese food at Lotus Blossom Cafe. Kind of average and greasy. The pastries at the cafe in France are just ok in my opinion.
I do like the food at the cantina in Mexico, the food at the yakitori house in Japan, and the fish and chips in England.
Downtown Disney-I'm not a big fan of Bongos takeout window. The food seems okay, but as I'm eating it, I always vow never to go there again!
I really like the food at Wolfgang Puck Express and the Cheesecake Factory inside Disney Quest.