It is only with the heart that one can see rightly;
what is essential is invisible to the eye. (Antoine De Saint-Exupery)
The real core of a beautiful room for me is its atmosphere.
The vibe it gives off and how it makes you feel.
What it does to you on the inside.
Rooms like those above may look gorgeous visually, (or not, depending on your preferred style), but it's how they make you FEEL that's the true test of whether or not the room is a success.
It's not until I get that satisfied and content feeling right in my core that I know I've got it just 'right' in a room.
And, as always on a Monday.... may your mojo be with you!