Most men wear a standard traditional point or button down collar dress shirt, either out of habit or because stores do not offer other choices. The problem is that these collars may not flatter the shape of your face.

An unusual but good read for the fashion savy gentleman - http://www.articleassets.com/Article/How-to-Choose-the-Best-Men-s-Collar-Styles-for-Your-Face-Shape/43468