We always do breakfast in the room. And as breakfast is often eggs/pancakes/french toast - actually a cooked breakfast - and not a bagel in a toaster or a bowl of cereal, we want a full kitchen. It was one of the surprises for me with
DVC - I thought I'd see the kitchen as a prop and never use it - turns out, at Disney I'm up early enough and the kids moved somewhat later so that I could get eggs or pancakes into them - and we could still all hit rope drop. And that full breakfast keeps us going to lunch.
We seldom use it for leftovers or other meals.
I also make far more use of the washer dryer than I thought I would when we bought.
And the exception to no dinners is Aulani (but not Hilton Head). We were at Aulani in January when parts were still Covid impacted. There really aren't sufficient restaurants on site for the occupancy - or even enough restaurants a close walk away (there are some, just not a lot) - and food is really expensive on the island - stacking Disney prices on top of already high Hawaii costs can give you sticker shock. Cooking is necessary for variety - or being able to drive closer to Honolulu. Hilton Head we always have dinner out - there are a lot of great places on the island - but usually do lunch in the room.