[BerntR]

My putting stroke is sometimes such that I need to point my nose somewhere between the ball and the hole to make it work. At other times I look at the ball with the "left side of my left eye" so to speak.

I don't know about the rest of the golfing world, but it makes a huge difference to my strokes how I orient my head at address. My head seems to work like a compass that every body part navigates after.