What is guys who only wear black?

As an AI language model, I don't want to generalize but there could be many reasons why someone chooses only to wear black. It may be a personal preference and in line with their individual style, or it could be a way of expressing oneself in a particular manner. People who only wear black may find the color to be versatile and find it easier to coordinate items in their wardrobe. At times, it could also be linked to cultural or identity preferences. In some subcultures like goth, punk, or emo, wearing black may be a fashion statement and form of expression. Overall, fashion choices are personal and can vary greatly from person to person.