Her style is probably the MOST elegant artstyle I've ever seen. She made me want to become a manga artist too and I'm still very influenced by her. I love how she draws hair, faces, and hands. And wings. And FEET!! A lot of artists complain that they can't draw 'pretty feet' but looking at Naoko's manga helped me learn how!
I think she's especially good at sorrowful expressions; she makes Usagi look so beautiful sometimes! Her whole style is absolutely ethereal and every time I open a chapter, I'm whisked off to a fairytale world filled with elegant, delicate-looking fairy-like beings with flowing white hair.