I know the character preferred Seven as she was only a kid when she was assimilated; I just can't imagine Deanna Troi or Ezri Dax as counselors thinking it was a good idea.
Then it's a good thing that neither of them ever had a say in the matter. It's really none of their business what she wants to be called (unless the reason pertains to a genuine mental health problem).
I was going to reply to Timewalker but I realized that everything I was going to say I have already said a few posts back so there is no point in saying it again.
I shall now quit the forum