When I downsized from the family house, (after all the children ha finally flown the nest), I wanted open plan. In the family house, we had a large kitchen/diner and a separate large Living room/Lounge. When I was living by myself there, hardly ever used the living room seemed no point. Would just stay in the dining area. Kept a small folding armchair there for me to use.
So, on moving wanted somewhere I would really LIVE in the whole of the downstairs. There I had a through lounge, and although the kitchen was separate, it had no door, just a continuation of the floor and between that and the dining end of the through lounge, the door was removed.
Loved that, really used the entire downstairs.