You ask this question as if you had a choice... lol.
I think if I were a woman, and had my brain... I'd be a helluva tomboy. I really do enjoy doing "guy" things like carpentry, welding, messing with machinery, hunting, fishing, and the like. I get called "ma'am" at Home Depot, where I spend many hours of my life.
Not that you have to be male to do any of those things... it's just how it shakes out, I suppose. Guys do that stuff and teach it to their male children, which is how I learned it. So in my mind, masculinity is competence -- being able to do anything that needs done and handle any disaster that comes your way. I'll even go so far as to include things like sewing and cooking in that 'competence' category.
We could also go with the theory that the masculine worldview runs on science, logic, facts, and measurements; while the feminine worldview runs on craz-- I mean, emotion and helpfulness.

There's nothing wrong with any of it, and no one is entirely one or the other.
I know men and women of both masculine and feminine persuasions. Everyone and everything has its place, and frankly, I don't think bashing on masculinity serves the slightest purpose.