I'm a little different on the subject. Granted it may not effect arrow flight. But I like to have all of the arrows coming off the bow the same way (same alignment). It helps me mentally in practice as I see the arrows the same way. I also align them for safety reason so that if the arrow does fall off, it will not cut my fingers. Some people also like to feel the back off the broadhead on their fingers just to know that they have come to full draw.