Ok, these two are "imperfect" as far as the breed standard goes, but they are perfect in every way to my family and me!
The first pic is of KoKo, my parents' yorkie. She is 12 lbs and her ears don't stand up. BUT, she is the smartest dog I've ever met in my life.
The second and thirds pics are of Sophie, my sister's yorkie (she used to be my yorkie...long story). Only one of her ears stands up and she has a severe underbite, thus her tonge sticks out almost all the time!
BUT, she VERY photogenic!