On Citywalk, I really enjoyed the breadbox, or Red Oven Pizza. My kids asked to eat there every day!
In Universal, I really enjoyed Leaky Cauldron, but the theming in Monsters Cafe was really cool too. Only thing, the Monsters Cafe line moves slowly.
The only two we tried in Islands of Adventure were Circus Mcgurkus and the Three Broomsticks and sadly, we do not want to eat at either a second time. Circus Mcgurkus was fine, just not that memorable. The Three Broomsticks had unevenly heated food, and some of it was inedible. I know The Three Broomsticks has a lot of fans.
Also if you go to Toothsome, make sure you ask for an inside table. All the entertainment is inside. The characters will not go outside.