Oh, I've never really watched any of her PVs. Just listening to her music and checking out some photos. But I don't follow her Japanese music. Maybe that's why... To me she was always kinda laid-back, down-to-earth, mature... Then bewteen Vol1.5 and 2 she became more rockish.
Anyway! What are your favorite songs from her? I think my ultimate favorite is "Gidarida". I don't know if she did a cover in Japanese... But it's so beautiful. It's a song from her first single!