Depends on who’s with me (or not).

I move around some.

I have this habbit of rolling during the sleep. If I sleep in my bed room I wake up in the hall. As a worst case, once I woke up in kitchen ?

On my side or face down.

I have no choice how or where in my bed I sleep these days now that my little lover boy, Einstein, a silky soft long-haired, black, Maine Coon/Persian is in my life. Before he came into my life, I could sleep on either side of the bed, and on either side of myself because I was simply flexible that way. But, now that he sleeps with me, I have to sleep on the right side of the bed on my left side with him cuddled either under my extended left arm or up against my left breast so that he's able to feel and hear my heart beat while we slumber. Such a sweet, wonderful, little lover boy, isn't he?!

Stomach or side while snuggling a pillow.

Not sure... I'm usually asleep at the time