"Youre not like other black people"

I was raised by my mother with my two older sisters and attended the local state schools, where I did it all sport, music, even public speaking competitions. I'm not really that different, although I do remember clearly being told by some of the other kids, You're not like other black people. I find that comments like this are made more commonly than they should be. They are generally unsettling and, ultimately, amusing for a number of reasons. What is it about me that was different to those other black people that I would stand out?