Based on the few conversations I've had with admissions dept people, reactions to personal statements are all over the place. Unfortunately, some schools think that a personal statement can hurt you, but can't help you very much. Yes, a good personal statement can be a tie breaker, but if your personal statement turns an admissions dean off, it can hurt you even if they like your numbers.
Inspiration for going to law school always plays well if you are sincere. I don't think your personal experiences are off limits. I wrote about a personal tragedy in mine, but I have no idea how it was received (I'm done with law school, but I was accepted to 1/3, rejected by 1/3, and waitlisted by 1/3 of the schools I applied to.)
The main question you need to ask is who will be reading this paper. What is their background and will they be looking for personal motivation.
It might also not hurt you to call a few admissions departments (maybe to schools you aren't applying to) and ask them what they think about it.
"I'm thinking about applying for your school. My reasons for going to law school are very personal and deal with some abuse I've suffered through. Is it appropriate if I include that in my personal statement?"