Like Kingdom she's not my favourite artist, but she's on top of my list.
I love her charisma and her ability to make great songs with passion and her deep lyrics no matter which genre it is. She's so versatile I easily can relate to her, cause I personally like pretty contrary genres, lol. Just love her for the fact alone that she's making heavy rock songs here and there.
And her great personality is a plus.
But she's not my favourite artist because of various reasons. From her big discography I just like about 60-70% of her songs. She has a lots of ballads and slower songs and I'm not a ballad person.
She has a absolutely unique voice but just a decent singing talent.
I dislike how she acts so totally cute sometimes, singing and speaking in a cute voice. She's a cute person, but it's just too much sometimes. She's not in her teens anymore.
I love artists who can also dance while singing, I'm just a sucker for that. And that's not Ayu at all.
Though she is able to compensate that and making great concerts with choreography nevertheless.