First off, your obviously a beautiful woman. Unfortunately, in my honest opinion this does 2 things, it brings attention via traffic to your site based on your photo's ambiance & beauty which is a compliment to yourself if the pic is real (as I'm not stating it's not by any means, but as an online marketer myself... I've used miscl free pics of beautiful women & atractive men to draw traffic, as we all know sex sells)
But secondly, doing so may cause those not so interested in your content to be there for all the wrong reasons. If your hub is focused on writing, or a specific resource or talent, I honestly think a pic can take away from your content, as surfers just want to add pretty people to their fan or friend list.
Ultimately, you should decide. I almost think if your promoting content, lose the pic. If your promoting yourself, keep the pic.
But what the heck do I know? Other than there is no right or wrong answer, and an opinion is just that, ultmately... You appear to be a smart & beautiful woman, I'm sure regardless what you do... It'll be right for you!
*Naturally, I'm one for the bathing suit pics... Yet if anyone needs to change their pic... it's me. As it was meant to coincide with one hub I wrote, not to be plastered everywhere!