For first timers, I recommend that they use the table dining as a break. Proximity to where they are or will be is important. So a midday break in or near a park works well or, if they go back to their resort (nap or pool time) and have park hopper, going out for dinner is also great.
No place is worth it for the food alone at Disney imo.
I like theme and that is what makes Disney special. I suggest a variety. Like one meal with Mickey and friends, one with face characters (CRT or Akersus or 1900 PF), one with interactions (50 PT or Whispering Canyon for example), maybe one with a show/demo/movie (Teppan Edo, Biergarden, Sci-Fi, HDD), one in a dark place, some AYCE, some you can eat a sundae for dinner if you’d like (Beaches n Cream), etc
I once had a friend that had booked Sci-Fi, St-Angel, T-Rex etc… and they were so tired of eating in the dark. So I added that to my list of redundancies to avoid.
The experiences should make them try something different everytime, fit well in their itinerary and include some of their food preferences.