Ooh a studio is impressive!
I'd like a boudoir, where I could retire to when I felt period of ennui descending (which would be often).
It would have a bed, a sofa, a telly and lots of box sets of DVDs. Books shoves full of books, a gorgeous French antique dressing table where I would sit and play with different hairstyles and new eyeshadows. There would be a large desk with drawers full of lovely stationery where I'd write to do lists. No one would ever be allowed to enter, once I'd taken to my room there would a family understanding that mummy was resting and should be left alone until I voluntarily reappear reenergised. Of course it would also have its own bathroom, with a bath.
This would be additional to the matrimonial bedroom where I would still probably sleep, most of that time.
As it is, I have a play room and a spice rack. So I lose. (defense my spice rack is inside a cupboard and not ornamental).