well, at least for me secret is still a perfect album
...and maybe not all Kingdom PVs are cheap... but MORE is.
such a mediocre video to such amazing song... story PVs were awesome, Himitsu and Koi no Mahou are
and Wonderland was great as well! from singles BUT, Aishou and FREAKY were the best and LAST ANGEL the worst (
)
PV-wise my favorite albums are definitely secret, BEST ~ss~ and TRICK. And probably new album will be too!
Her PVs are generally enjoyable and entertaining, I can't remember any mediocre ones except already mentioned from Kingdom and COS.