Women: What makes you think of a man as masculine?

In our society, which looks down on men who promote pride in their "manhood," and labels them as sexists, what's left for men to do that will make you think of us as "masculine?" Is it a certain walk, a certain way we carry ourselves, a certain deepness to our voice? A general self-confidence in our decisions? What is it, exactly, that will make you think of a man as masculine when you first meet him and start forming opinions about him?