It really depends on what you're looking for.
Fine Dining:
Our favorite restaurant on property is Hollywood Brown Derby

Food is wonderful & service is excellent! It is a Signature restaurant, so on the
DDP it's 2 TS credits. Even when we've used the DDP, we've paid OOP because it's not that much more expensive than many of the other sit down restaurants (example, we paid almost as much at the Princess dinner in Norway as we did for 1 appy, 4 entrees, 4 desserts, 4 drinks & 2 "adult" drinks)
Themed dining:
Sci-Fi is a lot of fun, and we've always had good food there. Nothing fancy, it is a "drive in" after all
50's PTC is also a lot of fun with good "comfort" food.
Mama Melrose is a pretty good Italian restaurant, think Olive Garden
We've only tried H&V once, but will never go back. Food was awful. There are way too many good choices to take a chance going back to H&V