Decades ago, when I was in my 20s, 30s, I went by Ms because at the time THAT was tantamount to a declaration of feminism and I wanted to be seen as one and also I wanted equality with men, who were all Mr and did not have to expose their marital status.
However, now I am in my 60s I go by Miss. My reasons for this is that I am a successful, self-made woman with a fat nest-egg, my own home, and my own business,
I am so proud that I achieved all by myself, receiving no help from any man, that I actively WANT people to know that I am and have never been married.
I also want to add that, throughout my life, whenever I have got myself financially entangled with a boyfriend (done that three times) the men ended up causing me to lose not only money but my independence and my peace of mind. Twenty-five years ago I decided that, in the future, no matter how much I loved a man, I would never, ever entangle our finances. Best decision ever!