Some of the ill character of some children you see today can be traced to wrong parenting or total lack of nurturing of that child, both morally and otherwise. I think I agree with you on this maturity trait. Maturity is important, mental development before raising a child is Vital otherwise we miss it all.
Talking about discipline, If a parent is not disciplined, he can't raise a disciplined child, so I see that as a must trait and the selflessness, all on point 👌