Geography: bed right (like stage right, but lying down), typically facing the door. If there is an adjoining wall, my back will be towards it.
Pillows: Two. One firm, one soft. I may use either one or both if the mood fits.
Covers: light or non-existent in summer, douvet in winter.
Window: open if possible, curtains open/blinds up.
Waterglass: only with a fever
Georgraphy: centre bed, head to the door, face to the wall.
Cover: one (two if chilled)
Window: open, curtains drawn/blind down
Waterglass: every night
My father was a bed left man; Mother - bed right.
All this analysis was triggered by a curiosity about how sleeping orientation and habit may offer insight into character traits expressed in the waking hours. No conclusions as yet, but there are insights to be had.
n.b. As an experiment, I am trying to explore the real estate dormie available to me: Centre bed is a strange place. Delightfully symmetrical, but oddly disarming.