Every parent has a favorite. Good parents try to treat every child equally. That does not always conceal which child is the most loved.
Teachers have preferred students/ parents too. I try my best to provide unbiased service for all. Still, there are a few who are dearer and closer to my heart. These are not always the most gifted. Often it's attitude or shared values. Sometimes it's pure chemistry.
Mothers of sons tend to show more vulnerability than mothers of daughters.
Angry mothers are the least rational among all irrational creatures. Their logic is Angry Bird's.