The most noticeable and useful part of the masculince face (at least to me) is the brow bone/ridge. On males it tends to be much more prominent and sets the eyebrows lower on the face, as well as the eyes further back in the sockets,
giving them a slightly sunken look.
The brow ridge is important bc on masculine faces it tends to be much more pronounced. It also can squash and stretch a lot to exaggerate expressions!
even on chubbier characters the brow should be clearly shown, since fat rarely accumulates above the cheeks.
tbh just play with rectangles. Sharpe edges and boxes shapes. The more burly and manly you want the character to be, the more sharp and defined the features should be. Also don’t be afraid to give your guys bigger noses, defined nostrils, thinner lips and bigger chins/jaws.
Instead of starting from an oval or circle shape when drawing faces, I almost ALWAYS start from a box. I’m not sure exactly when I made this change, but it was the start of my discovering my love of drawing manly men lmao. Really it’s just about finding the right proportions for the face you’re trying to create!
hopefully this will help yall in your pursuit of drawing dudes.