Personally, I like a pure breed rooster, on mutt chickens. You can quickly improve your chickens this way. I am switching from the dual purpose to a more egg laying flock. I am getting an assortment of leghorn chicks this spring, reporting to be 7 different kinds of leghorns, straight run.
It...
I agree Mystery Chicken. The human behavior that is influential, is the ability to cull birds that don't work. I find the chicken society of the flock being quite influential, but it is the inability to cull that causes problems.