I'd say that on terms of quality almost every PV that comes to my mind are ballads: hands, you, Ai wo tomenaide, Moon Crying, Unmei... But there's also Hashire!, ECSTASY, You're So Beautiful (as I've already said here before, UNIVERSE era was pure epicness when it came to visual quality), Candy, Ningyo hime, BUT, FREAKY... omg so many PVs, that's the hardest part of being a Kuu stan: choosing your favorite things from her
