I think you should go back to natural blonde, I love these photos
just my opinion
I prefer you the way you were, and I usually like darker haired girls. But only go as far as you used to be, bottle blonde or that horrendous 'white' blonde wouldn't suit. Just my personal opinion, though.
From my point of view, as a photographer, it would not matter. I think you look equally as good with either hair colour. You have some great photos on your port from after turning brunette.
I have known models that have gone from blonde to brown and they look dramatically different. But you don't.
I would suggest you choose which colour you like best and not be too bothered by what the photographers think.
I have a strong personal dislike of overbleached blonde hair with dark roots. I know Madonna gets away with it, but I hate it and think it looks unkempt.
Just my 2c worth.
Shave your head. Use the money saved in hairdressing costs to buy wigs.
It won't be long before you have enough to be either colour at will,
and soon after that you can add other coloured wigs with the money you've saved on hair-dyes too.
Makes perfect sense to me.
I cant say whether Ive had more work since Ive been brunette, because I moved from Norfolk to Cambridge recently. I know its not a massive move but Ive had shoots since the move, so it could be because of that, or it could be the hair colour, I don't know.
I might go back to blonde when it starts to get a bit warmer. I understand the need for a model to be consistent- I know it may seem annoying when people keep changing their appearances, its hard to keep up to date with them! With regards to going back to blonde, my friend recently went back from brunette to her natural blonde. She used a product called 'Colour B4'- which lifts the dark colour off of the natural colour. Her's came out fine, ever so slightly strawberry blonde, but she put a toner over the top which brought it back to a nice, natural shade.