I've hennaed 3 times since January. While I liked the color, I find that henna didn't suit my hair. Since hennaing, my hair has been having an odd feeling and has been murder to detangle. And for a few weeks after an application my hair would feel like plastic when wet. Yuck. Plus, it not only loosened my curl, in some areas it replaced it with frizz--and not the good kind.
Also, I have a lot of grey, which I don't have a problem with. But grey roots make me feel old, and I don't want to be a slave to color. So I've chopped off my hair and the majority of the henna. I'll probably have to go back to the salon in January to get the rest out. Lesson learned, I'm not even going to touch the cassia or the amla in my stash.