D, and sometimes on my wife but she doesn't appreciate it :)
Belly sleeper here, although I usually draw one leg up, so that my arms (one arm up, under pillow; one arm with elbow on knee, holding other hand) complete the bizarre "letter" look (like a capital P and a capital B had a love child).
D all of the above ... Im a restless sleeper
back and sides!
Usually my left side, sometimes my back
On my side arm under the pillow head resting on pillow>>on arm
Sides and straight
D). But I mostly sleep on my sides
upside down....mouth open...
D ... all of the above, all of the time.
B. Flat on my stomach, hugging my pillow.
D probably I usually start out as A but I twist and turn a lot