As a teen, I was very butch as far as how I presented...inasmuch as my mother allowed me to be. Fortunately, I didn't get the breasts that other girls were developing, so I was able to just cover them with muscle shirts. To this day, I can still fit a "training bra". I refused to wear a dress other than the couple of hours a week when I was required to go to church. I didn't shave or wear make-up or purses or shoes with heels.
In high school I did okay until they adopted a uniform policy. It caused a bit of trouble for me because I didn't want to wear the cutesy plaid wrap-skirt that the school had picked out for the girls to wear. Instead, I wore the boy's uniform. The school tried to prevent me from wearing it but my mom intervened on my behalf.
I remember my favorite time of the school year was Spirit Week because there was a different theme for each day, one of which was "Opposite Sex Day". Lots of girls would come to me and ask to help them with their clothes or have me draw a moustache on their face with their make-up pencils. It was the one day of the year where I felt like it wasn't just okay to be me but actually GOOD to be who I was. I was able to be a girl and fit in without having to be femme.
Over the past five or so years, I've become more femme-looking but it still pains me to hear about what many butch women experience every day. I remember how it felt when I was constantly being called "dyke" or "dyke-bitch" whenever someone wanted to insult me. In that environment, it was impossible to convince myself that it was okay to be me. It was like, to them, having any sort of "questionable" sexuality was bad enough but to have the audacity to not try and cover that fact up by looking feminine...well, that was more than they could/would tolerate.
Wouldn't you know, it was always the girls who used that as an insult. It was a non-issue for most of the boys; They never seemed put-off by how I looked. I really wish we (women) could get to the point where we stopped being so concerned about how other people present themselves to the world. I think this would make the planet a lot easier to deal with for many people.