Peckish, if you can hold out, I think ignoring is probably the best tactic. It sounds as though she doesn't understand that people are different, and that what's best for one person creatively would be anathema to another.
Have you tried thanking her extravagantly every time she brings it up? (Oh, that is so kind of you to be worrying about my work method; I hope it's not keeping you awake at night!) Maybe if you lay it on really thick, the fact that you have no intention of adopting her style will get through in a way it failed to with protestations.