Sometimes I will get into a trans-related discussion with someone who knows my past (or even someone who doesn't), and this tired old thing comes up, that most men are insecure about their masculinity (in America, anyway), and so I (or the trans man in question) am not alone.
The thing is, I'm not insecure about my masculinity. It has been a constant in my life, even when I fought it. I am comfortable with my degree of "masculinity"--by which I mean, the degree to which I do or do not fit into stereotypical, established patterns.
What I am insecure about is my MALENESS.