Breast preference?

I have two completely different sized boobs always have ever since puberty. And it looks as though my daughter prefers the bigger one. When I try to feed her from the smaller one she pulls away she doesn't want anything to do with it but the second I give her the bigger one she snacks away and always falls asleep using it as a pillow most of the time. Anyone elses baby have a preference and also will my boobs be even stranger looking if she continues to only nurse from one?