We love the ABC Commissary. Plenty of seating, and we love the Cuban Sandwich with plantain chips and also like the curry bowl and Asian salad. My dd had a burger and it was fine, nothing spectacular but it tasted like all the other burgers we eat at WDW. If you like Cuban sandwiches, ABC is great. Theirs is more like a panini and I love those plantain chips. It does tend to get bad reviews, but honestly, we eat there every trip and love it.
We also like Rosies for burgers.
Pizza Planet serves the same yucky pizza they serve everywhere else in WDW so I avoid that at all costs. The only WDW pizza I will eat is the Boardwalk pizza window and Wolfgang Puck's.