Hi Mashed,
My experience is the opposite to yours, where you said the person you were was killed off, I worry everything I am is because of what happened to me.
As my abuse started from the age of three (every single weekend), and then the other 6 days in the week my dad was knocking seven bells out of me, my brother and my mum, I can't ever recall a happy memory from my childhood, they are all tainted.
I now question everything I do and wonder if I had a "normal" upbringing would I be a different person, because I do think 10 years of hell with my uncle coupled with 18 years of it with my dad has undoubtedly shaped me.
People who don't know my past comment on how mature I am and how grown up I've always been for my age compared to my peers. I do question sometimes if I would have been mature etc if I hadn't gone through it, I guess I will never know.
I share sympathy with the sleeping around, I did it too, I needed to prove myself I could use sex and not be scared by it, hell I needed to prove I was good at it too. Interestingly, when I went to the police, another of my lovely sodding family members pointed out I couldn't have gone through what I said as I had lots of boyfriends in my teens!!! Yep, whatever!
Mostly I'm fine, but a guy I've become friends with (nothing more, I have a DH) who is 21 commented the other day that I have "little person attitude" which obviously can be taken to mean can be nasty and violent, I agree that I do have a temper, which I keep very carefully in check, because I never want to be like my dad. He was joking around, because he was being annoying and I threatened to wallop him one if he carried on, he then commented something stupid like "I wouldn't want to mess with you, you've got it in you to do that". Can you tell it really bugged me 
Interestingly, I don't really discuss what happened with my uncle, but I have started being more open about my Dad and his DV, people still have no idea how to respond to it.
Sorry for the very long posting.