I have long,past my shoulders, naturally curly hair. I am approaching my 57th birthday.
I do dye my hair, as the transitional color change from dark brown to gray/silver is not to my liking. While it is less of a hassle to just let it go gray, I really prefer to keep it dyed dark brown until it all finishes changing from dark brown to gray/silver. When it finally starts coming out all gray/silver, I will quit dying it, but I will still keep it longer.
If you have a problem with frizziness or dry hair, try a super moisturizing conditioner, and leave it on twice as long as recommended on the label. For between shampoos frizziness, try spraying some detangler on your hair, wet your hands with WARM water, and runs your fingers through your hair, to spread out the detangler. Comb it out, but wet your comb with warm water before you comb your hair. Cool water has a tendancy to make the frizz worse, so always use warm water.