I personally don't like her hair short at some times, but there are times when I like it.
EDIT: I finally found a time where I didn't like her hair! (<-- omigosh that sounded so mean! gomen!) I actually didn't care for her hair at a-nation '03. Y'know, with those pigtails?
I agree that her
Stadium Tour 2002 hair was great!
2NDEDIT: Oh yeah! Her hair at the 34th Japan Cable Awards when she performed Dearest.