I'm glad ayu did not make PV's for personal songs; such as Teddy Bear/Memorial Address/Who.. .. They are simply too personal to her life and I dont think she would be able to do them well. It's hard to convey inner feelings that develop over many years in a 5 minute PV. Plus; I dont think she could handle really personal PV's being marketed by a company (Thats what companies do; make money, right?) and thats why she stayed away from doing those songs.
Take for example Who... Ayu cant go even a few minutes into that song without bursting into tears! (As shown by many lives)