I'm talking about things that may make some people uncomfortable, but give a lot of perspective into where you come from/who you are. (ie: family infidelity, rage/bitterness towards a parent/sibling, divorce/abandonment, etc.) What about if the message is ultimately a positive one? (ie: I've aspired to be a better person/rise above/not become a part of the cycle). What's the defining line of honesty and too MUCH honesty?
When in doubt, don't!
I completely disagree. I wrote a similar type of essay and it worked very well for me. I even had a few admissions officers personally contact me to let me know that. Like you (the OP) said, it sheds a lot of light on where you come from and who you are.
That said, there of course has to be some overarching point to it. But you seem to already understand that.
Anyway, it appears you've run away at this point, so there's no need for me to keep typing.