Boobs make it really uncomfortable for me to sleep on my stomach, that and it feels weird on my neck. And on my back is so uncomfortable that I can't imagine ever sleeping on my back, even though a bunch of things say it's healthiest to do so. Not me.
I like cuddling if I have someone available; but, I always have to hug and cuddle with something. Person or a pillow, it doesn't matter. But if they're behind me, I still need the pillow in front. When I sleep alone I have body pillows on both sides for when I roll over.
I guess I'm kinda picky...