potential bullshit warning [1]:
Parents who take time for themselves and don't _just_ live for their kids tend to end up happier and with better relationships with their children as they grow up.
[1] I don't have children of my own, so wtf do I know. But: My lifestyle, spending a lot of time practically living with my friends and their families, allows me to get a fairly deep insight into a large set of varied families over the last 20y.