What went "wrong" with RAINBOW?

[TakaSama]

It's funny, because I am... is my favorite Ayu album and I used to hate RAINBOW. But now, RAINBOW, which I used to think was so different from I am... now feels more like the more inventive sister of it. I think a big part of that was the fact that RAINBOW was her first copy controlled album, and since I listened to CDs on my computer, I disliked it for that reason. I also thought that Ayu's sudden use of English in her songs was jarring. But listening to it now, it seems so new and rich compared to some of her recent albums. Don't get me wrong, I've liked all of her recent releases as well, but for very different reasons. I am... and Rainbow are the height of Ayu's personal creativity in my opinion.