It's a question I tackled 18 months ago when I still had long 'blonde' hair. Even with thick hair, and a preference for it long, wearing it long and grey seemed impossible. I admired beautiful, long white hair in the Gudrun Sjoden range of clothes (a pity photos aren't an option, here); and the designer herself has long white hair, but it didn't feel right for me. So it was cut off short to allow the white to come through. Well, white in front and near black at the back. My landlord said, "Phew!" You look completely different - so much younger. Ah well, then...