Hi Amy!
Our family chose Deluxe Dining our last 2 Disney trips, and let me say there wasn't much on the menu we weren't entitled to!
Any meal on the menu that's considered an "entree" you are entitled to, and almost all the meal menu options are entree meals.
Table service meals also entitles each adult to all the appetizers and dessert options. If you go buffet, of course you get everything on the list. Quick service normally doesn't come with an appetizer, but all entree/dessert options you are entitled to.
It was always funny when we would sit down and the host or hostess would ask which dining plan, when we would say "Deluxe," they'd always say "you're entitled to everything." Although there were a few restrictions, such as we didn't get the Wine option added for alcoholic beverages, and wasn't entitled to alcohol, you'll find few limitations when you visit the restaurants on this plan.
Just bring your appetite! It's a lot of good eating!
Best wishes on your upcoming trip!