TL;DR. If anything, having a MH issue gives me more motivation to make sure I would behave properly as a parent & give them the skills they need to look out for themselves, while being supportive of them & not allowing them to live in uncertain circumstances. I'd also know what kinds of signs to look for to see if my child is having symptoms & I now know how to at least help them live alongside it rather than against it...
I'm not sure if genetics are involved, myself. I have long histories of personality disorders & mood disorders on both sides of my family. Still, I'm not sure whether it is the heredity or their damn behaviour/life decisions that had a greater bearing on who I am now.