Is this wrong? Or is it improper of me to do this?

Well, I'm in the eight,grade but I am only 11 and well, i've always been more confortable hanging out with boys at the age raging from 15-28 and mostly they are marines and other military people and I hang out with them because I have an older brother who is in the Marines. I don't really crush on boys my age. I skateboard, play the electric guitar, hate fashion, hate shopping. This what I would usually wear: black jeans, a graphic t-shirt usually white and black, black leather boots or sneakers, and a purple jacket. People think that it's not right and proper for a girl to be like this. I don't have a passion for make-up, I absoloutely and definitely hate it , and people are saying that there is something wrong with me. Do you agree with them abd no, I am not some emo-chik