Our experience at the ABC Commissary was just horrid. We enjoyed the Backlot Express, however.
For MK, Cosmic Ray's is even better now. They have more healthy selections on the menu, and there are even healthy kids' meals now! We don't have kids, but I'm always dismayed when there are no healthy choices for kids. Columbia Harbor House was nice as well, and we like to people watch upstairs, too.

Pinnochio's is decent, their turkey sandwich on whole wheat was yummy (and it comes with baked chips). Pecos Bill's has a great chicken wrap, and most of these places have toppings bars - makes the prices a little easier to swallow! (ha ha

). You really can't go wrong anywhere at the MK, I think.
Oh, and the fries at Casey's are REAL fries, not the "standard Disney fries," as we call them.