Eh, it changes night to night and throughout the night. I tend to change positions a lot before eventually falling asleep, and it's rarely in the same position. I usually alternate between some "fetal/yearner/freefaller" position, though sometimes I find its easier to get to sleep in a "soldier" position on nights where I find it hard to get to sleep. My "yearner" position also involves resting my arms on half my pillow.
And yes, the blanket rarely covers all of me except sometimes in winter. I hate heat/feeling too hot when I sleep.
I think their linking of sleep positions and personality is a bit silly, though
Either that or I have numerous personalities