This one isn't necessarily seen as a masculine trait. But I do admire men that can be vulnerable and open with me. I am awed when I am trusted with seeing this aspect. I know how difficult it is to be vulnerable around others, for them to witness it. Which means I cherish it even more as it happens. 

You don't realise how touching it is to see a man crying in front of me. I know not everyone shares this admiration and I know it can be abused. But at the same time it is something that is touching to me. It's a reminder to me that sometimes we do need to cry and that it is okay for me to cry if I need to. If anything, I just want to protect and comfort if I can.

Of course, tears aren't the only way of being vulnerable. Being able to be open and honest about yourself is another way, to yourself or to others. Being able to be open about all sorts of topics to discuss. I like having conversations with guys because so much more is open to discuss often.

I also admired a guy who tried to teach me how to brush comments/insults off through knowing yourself, and being able to accept or reject based on reality. That other people didn't necessarily know you and so you needed to measure it based on how well they know you, and whether something is true or false. I'm afraid to say that I didn't put this into practice so I can't say whether it works or not. But it is interesting. I'm sure there are other ways.