Head down is always good ;)
The back to your left is the best position, but really, any OA position is better than OP!
I know which way baby is now, as is easy to feel, apart from the head, which I struggle to feel if it is in pelvis or not! But I didn't get the kind of movements associated with the position it is in.
So now I'm not so sure about spinning babies....
For what it is worth, all my movements are right in my sides, pushing outwards, and in my hips. Right hip for LOA, left hip for ROA! It pushes with it's arms! Also the movements at the top of bump from the bottom as it swings from left to right! And there are no wiggles or anything! Just full on crashes and bangs 
It hasn't favoured a position yet 