I have gone back and forth over the last 6 years. I've stayed with the same stylist the whole time so she has my entire hair history written down. I was bleached-blonde for a few years, but it really took a toll on my hair because it's naturally really dark and I was in the salon all the time. Then I think I dyed it back to its natural colour, which faded out, then I started highlighting it again. I put in red and low lights. Then I started putting in subtle dark-blondish highlights again. The last time I went I put some darker streaks in it again. It's healthy again so I can do whatever I want. I'm not keen on going back to my natural colour for a while though, I find it boring. If I were you, I would try lowlights first so you can adjust to the darker colour and it will be more healthy that way. Then you can gradually start going darker to find the exact shade you love.