I suit blonde, I always go back to blonde and my natural hair colour is dark blonde.
With that said, going platinum / white was something I really quite regret as it is one of those things you are stuck with as hairdressers shy away from toning it down and taking it back to a natural colour.
I took myself off to my favourite hairdresser, Nicola, and asked her to make me a more natural blonde. It was a 4hr process which involved laying a gold based toner over the white to add a colour deposit then another colour on top. It will need tweaking again on my next visit but it's such a natural colour.