Do you sleep North South, or East West or West East etc? Or do you neither know nor care?
I slept really well in a hotel recently but really badly at a friend's house. I felt disorientated and wondered if it was anything to do with having head north or east or any which way!
I sleep the way that I positioned my bed (simply because it fitted my furniture arrangement best) when I moved in here 31 years ago. That's with my head at the south and my feet to the north. However, if I feel that I can't get to sleep for some reason, I'll sometimes move my pillow to the other end of the bed and reverse the direction.