Obviously not every chapter is going to be looking for the same type of girl, nor is every sister within a given chapter going to be looking for the same type of this girl. There are chapters who have taken many "risky" girls and turned them into successes. There are chapters who have taken risky girls who have torn the chapter apart. The chapters don't know which risks to take should probably stick to the less risky girls.
But speaking for me, I'd rather have a great sister than someone who looks good on paper but isn't there for me.