I agree that it depends in your skin tone and how it plays against the gray. I personally don't have the coloring for it, it washes me out. Others look better with gray. I think there is a huge difference between buying into social standards for beauty and truly shinning your most beautiful self. Taking care of our bodies and expressing our vision of beauty is fun and speaks of self love and self respect. In my mind buying into social norms about beauty comes form a place inside ourselves where we believe we are not good enough being who we are. That we must make ourselves easier to like or love. The motivation comes from a sense of lacking. Owning our own style and vision of beauty comes from a place of self empowerment.
There are natural ways to color your hair, that improve your hairs health. You can get blond with Cassia, brunette and black mixing Henna and Indigo and beautiful shades of red and Auburn with Henna. There is an art and procedure to mixing the herbs to get the color you want, this website is full of info and sells really good quality products.
www.mehandi.com
Natural dyes don't lighten hair so going over gray give you lots of choices. I love the Raven black you can get with mixing Indigo with Henna, it's stunning and there is no chemical yucky-ness to deal with.