Something Ive noticed in masculine faces, is the little space between the eyeball and the eyebrow. Normally, in femenine faces, this space is larger, and gives a softer expression to the face. When the space in shorter, it gives a thougher look, and that works for every tough character but specially in men its a common pattern.

In this drawing, you can see Cloud Strife from Final Fantasy VII Remake, and how his facial expression is carried by the look in his eyes, in which eyebrows have a major role.

If you wondered why your face drawings didnt look as rude/though as it needed to, this may be it! #XPPenTutorialPractice