I've always liked her stuff. "Twilight" is my favorite song that she's ever done. It has a haunting melody that matches extremely well with her voice. I also like how she writes the lyrics, music, and actually plays the piano in her songs. She's not a typical pop artist by any means.
"Ordinary Day" and "Thousand Miles" were overplayed to death, and kind of took some of the bite out of her style. It's been a couple of years though, so it's still enjoyable.