Oh, not a good one from me - the frustration.
I was really surprised that I could see why someone would shake a baby.
I didn't, and I'm over all that now, so I guess the world's babies are safe - but, I can totally see why someone can be driven over the edge of sanity and can hurt a tiny, defenceless person whom they love with all your heart.
But, then, I had rampant PND which was undiagnosed as I was very good at pretending everything was fine.
But, yep, that's my worst thing - and, if you get the slightest inkling that you identify with what I'm saying then, please, tell someone. I eventually did, and it was all smashing after that.
Though, I STILL wouldn't mind having enough peace and quiet to enjoy a shit without "muuu-uuuuum"