That's an exercise I'll have to make myself do tomorrow garlicbutter. List off 15 good qualities. Think I'd struggle to get to three 
Although to begin with I wanted to rant and vent about my x, I guess it is more useful to examine why I put up with his behaviour, why I ended up in an abusive relationship etc.. also, she has said to me that my core self worth is not actually that low (which is good) but that I have a lot of negative voices! so basically it's the dialogue in my own head I need to change. I need those voices
to be kinder to me, instead of so critical.
Bejeezus, I went to see a counsellor through the gp just after I left my x. I was a mess then. I was devastated, trying to fend off his cycle of niceness,martyrdom & bullying me to go back to him. I was trying to get to grips with all the practical arrangements and my new 'status' as a single parent!!! The gp/counsellor was rubbish. She didn't identify that I had post traumatic stress. And sorry if that sounds really self-indulgent! but I think I did. the 8 years with him was like war. And when I got 'home' I was even more of a basket case, yet I had functioned on auto pilot in an anaesthetised kind of way for years before I'd finally left. Anyway, this gp told me to get a job! I was a bit
I honestly didn't think I could put together a cv and job hunt and get through and interview without crying! HONESTLY it makes me think arrhghghghg to think of her listening to people in such distress and to suggest that they get a job. wtf.
But this woman I'm seeing now is much more highly qualified and she can get to the root of why I found myself in an abusive relationship, and why I'm so hard on myself. It's probably only possible to do that because I can talk a bit more calmly now, without crying and taking everything back to my x and all the things he did. Yes he treated me like an incompetent employee for years, but in order to make sure I never ever allow this to happen again I need to understand why I allowed it.
I have realised that I prioritised APPEARING to be happy over actually being happy. I got to that bit on my own. But she's definitely helping me figure out why I did that. As garlicbutter says, it's not easy. you're given an exercise, to answer a relatively simple question but because it's about YOU, you are suddenly paralysed and can't answer it. I could answer the same/question on behalf of my best friends I think.
so, wow, I've rambled here, but yes I definitely think that it's good, when you're ready. First I'd go to somebody who will allow you to vent and cry and rant. And then when you're ready for a bit of navel-gazing, you can crank it up a notch! I would have found this very hard work, very tiring and impossible really, about 2 years ago.