A lot of vitriol here
Mika Nakashima, BoA, and Mai Kuraki
What happened? After Glamorous Sky, Love & Honesty, and Fairy Tale, it all went downhill fast.
The biggest disappointment:
Hikaru Utada
I struggled and I struggled over who I liked better before: Ayu or Hikki. And then Exodus came along. Flavor of Life had me fooled as a great song for a few weeks, and then I realized it was just an inferior version of Colors. Kiss and Cry, I will have to see...
Never really liked:
Koda Kumi
I like a handful of songs. I like her personality. Too bad the overall music isn't as great as the sales numbers make it out to be.
Through it all, Ayu's music has remained consistently appealing to me. Not as intensely exciting as before, but now more like a plateau of bliss. Thankfully, I never really fed off the hype, so I know my love is genuine

Hehe. I've been having an eight-year affair with Ayu. I am not giving up anytime soon!
Namie, too, hasn't failed me yet. Some singles are terrible, but she always makes up for them with better ones or a great album.
Been doing well so far: Angela Aki and Chihiro Onitsuka (new single rekindled the love).
Why no men? Well...