Have you ever taken the True Colors test? I come out a strong green which is definately Ravenclaw. And according to this website http://www.friesian.com/types.htm Melencholics fit with Ravenclaw, so that's two. Cholerics fit with Slytherin and I am not Choleric. But put me in Slytherin.
But saying I'm a "Muggle-born Slytherin" is my way of saying I'm a bit of a contradiction and not easily put in a box.