i have brown hair
Me too. Its the second most common human hair colour.
What is responsible for human hair coloring and brown hair in particular 
Its the higher level of a dark pigment eumelanin and lower levels of the pale pigment pheomelanin
Hmm That is amazing to hear. What type of hair color do you have yourself?
I have brown as I have stated earlier. Brown varies from light brown to an almost black colour. Actually black hair is the most common colour in the world.
I love black hair on people as well. But i prefer mine to be brown. So i am perfect the way i am
Me too, we are who we are. We brown haired people will most often be referred to as brunette
Yes, i have been called that many times. Is it true that the same pigment responsible for hair coloration is responsible for skin coloration? 
That is interesting. Our hair is more common around the western world especially around Central Europe.