so I sleep kind of weird. If my BF isnt staying I sleep dead center of the bed. I have to pillows with a bit of a gap between them and then a really soft one over top of the gap. So its kind of 1 and 1/2 pillows! If I just sleep with the one then its too soft and if I sleep with two its a bit too big.
Like I said I'm weird!
Two - one small, flat one for my head, and a long body pillow to prevent me from turning over on my stomach, as I have a bad back, and sleeping on your stomach on a waterbed is a no no for people with back issues.