Oh yes. Actually, it's so odd (bearing in mind I'm trying to sleep in a consistent way) that on overnights I will do my best to go starboard. The reason being is to do with the fact that I prefer blood to run down to my toes than up to my head. Not very scientific, but it works for me. Daytimes it doesn't bother me, but over the years BA have taken 767s off my routes for one reason or another.