I take my models from the men I knew, which I admired greatly. They had a combination of traits, but basically these in particular:
* They protected their families and close friends at any cost.
* Almost all of them had used lethal force on another human being or animal.
* They were all trained and dedicated to excellence at their fields, related to what they felt was their purpose in life.
* They always placed that purpose in life above all else, including relationships.
* They were courageous and had accepted that there was a cost to all things, and generally accepted death as a possibility.
* They valued justice, usually over compassion.
* They were polite, but intent. They gave insult when they intended to insult.
I suppose that ultimately I admire men who are capable of dispensing change, which in many ways, is power in one way or another with what I considered courage and justice and intimately tied with physical force in some form. So essentially, I think I'm fairly traditional in admiring masculinity as the men who fight bears with bare hands
The male as warrior and hunter archetype resonates deeply with me.
For example, I have a few friends who I consider as my inner circle, the people I really do depend on for life. I think it shows what I feel about what defines men by how we've treated each other - loyally and clannishly, even if it wasn't persay ethical to the rest of the world. One of them, I'll call The Russian; I knew him when he was 17 and slightly younger than me, I remember him being very 'twitchy' but frighteningly good whenever he got into trouble or fights. He was also endearingly ruthless, and even then, plainly offered to beat up anyone for me so as long as I did my part to protect him from the consequences and recognized his loyalty. Over time, keeping in loyalty for his family loyalty and ambition, I helped him through schoolwork and exams, even the MCAT and sometimes used my position to essentially steal solutions for him.
Long story short, he is where he is now in no small part because I had unstinting and unrelenting loyalty to him, and vice versa. We had a deep passion for what we saw as what was right, and I'll never have to check my words or hesitate in confiding in him. That loyalty to his clan, his family and need to excel defines him very much as a man to me.
http://www.stevepavlina.com/blog/2008/05/how-to-be-a-man/ is a pretty good guide as well to me.