They've done studies and found that trans men's brains are wired just like a cis-male's in some parts, rather than a woman's. It's just harder for us to accept that when we're born with female bodies, and society tells us we need to be women.
I've always felt I struggled more with my gender because, despite having a female body, I've always had masculine traits, that caused people to make fun of me. People made me feel ashamed for having these traits, and convinced me that I'm just a gross female. I began to loathe my male traits, despite feeling pride over them deep down inside. Every time I would try to begin transition, people would make me feel like I needed to try harder at being a woman.
And then, one day, I did try. I took natural feminizing hormones (which I guess worked so well because I wasn't producing them in high qualities naturally). I tried to figure out how to use makeup (didn't work), I tried to corset train to get a more curvy figure (worked to some degree), and I tried to wear more feminine clothes (also not good at that). In the end, it drove me closer and closer to suicide. Eventually, I realized, I was being what everyone wanted me to be, but I wasn't being myself. I spent a lot of money, time, and effort, and all I got out of it was a few suicide attempts. I had been successful at becoming a woman, given where I started from, but it only made me feel horrible about myself. My appearance may have been more feminine, but my soul didn't change.
I guess the point here is, don't feel like you have to ever "try" to be a woman, just because of the body you were dealt. I know it's a lot easier to see what's outside, rather than what your brain looks like, but if we all lived by that logic, we would be an incredibly stupid, albeit beautiful, race, with a lot of mental problems. You need to be true to yourself, not to society. Don't ever "try" to become something you're not, just because you feel like it's somehow required by nature. If you're miserable being a woman, it's because you aren't, not where it counts. If you try and fail like I did, you'll realize you've lost a lot of years where you could have been living as your true self. You'll miss out on a lot of happiness and freedom.
Besides, as has been said, it really is a lot of work being female, although women who enjoy femininity do actually enjoy the act of taking care of themselves. Doing their makeup, hair, dressing up and going shopping...But that's all a personal preference, nothing more. Even if you weren't trans, if you were simply a female who doesn't like feminine things, there's no need to try harder, to do things you don't like naturally. There's no need to try to do what everyone else is doing. We all have the potential to be beautiful in our own way, and you will lose that if you lie to yourself about who you are.
You're always going to put more pressure on yourself than other people will. And sometimes that causes us to create barriers within ourselves. We just need to learn to find ways to cross those barriers, break them down, so that we can reach our own goals, not our preconceived notions on other people's goals for ourselves.
