Wow! such a controversial topic, i hope K.A.Z's fans won't feel offended.

I can see where you're coming from: i didn't care much about Kaz until recently, i was mostly a HYDE fan...no....i was mostly a L'Arc-en-Ciel fan; if i were more into hyde's solo music, i think i'd appreciate Kaz earlier (but i did know that he wrote one of my favorites, Season's Call).
Even though i used to think like you do now, i disagree with the "hyde's support musician" idea...he is not and never was. But, yeah, i still don't feel much cohesiveness in VAMPS, i feel like they're two musicians kinda working together and not a really unit, so i can understand why you can be fan of one of them and not care much about the other one (this also applies to fans of K.A.Z).

Anyway, in the last months some things happened and Kaz really grew on me:
- I liked Times goes by better than Love Addict
- I watched DMC and i found out that he wrote the opening.
- I liked the songs he wrote for the Vamps album...a little better than hyde's song (don't get me wrong...i liked hyde's songs as well, Evanescent is one of my favorites)
- I started to check out his other projects (Spin Aqua is love).

At this point, Kaz was to me this great musician who was kinda cute, but i went to the U.S. to see "my beloved HYDE" . My hand-made present was for "VAMPS", but it was clearly inspired by hyde's drawings.

Then...
- I found out that he's really hot in person (yeah, i know i'm being shallow)
- In the Portland show, his live performance was a very nice surprise for me...he had such a strong presence and was very into his playing. I was a bit underwhelmed by hyde's performance, so Kaz and Ju-ken kinda made the show for me.
- I read about Kaz being such a cutie with fans.
- I read his Tour Diary ...he thanked fans like me, who traveled from very far to to see VAMPS. This made me happy!
- he's smiling more in the interviews...he has such a cute smiling eyes(like this: ^^).

So yeah, i'm in a K.A.Z love phase right now <3
I still feel like HYDE is made of awesome and hotness, but he seriously needs some vacations and loose up some more with non-japanese audiences.