Truth is, most important part of hair is the hairline, all the best haircuts show off the hairline, the worst ones obscure it in general.
When people look at you they subconsciously divide your face in to 3 thirds, chin to bottom of nose, nose to eyebrows, eyebrows to hairline.If you have a receding hairline it throws all your proportions off as your top 3rd is too long to match the other 2 thirds, which should all be equal, and if not just the lower 3rd larger than the rest.Its like bald men who get their scalp tattooed to look like short shaved hair, and give themselves a norwood 1 fake hairline, look so much better than without, it frames their face again.