Disclaimer: Naruto isn't mine
Being a dad means listening to your father and your father-in-law talk about raising kids, regardless of what kind of fathers they were.
Hisashi fulfilled the role of Hizashi when it came down to offering Gaara and Neji advice on being fathers. Despite Hisashi not initially(or openly) liking the fact Neji was pregnant he cooled down enough to offer advice on parenting. Gaara didn't want Hisashi's advice. Anybody with a third of a brain knew what kind of father Hisashi was.
"Treat your children with respect." Right like you treated Hinata and Hanabi with respect.
"Spend time with your children." This coming from the man who is the master of late nights at the office.
"Love your children more than anything." And you did?
"Gaara, you don't have to listen to my advice," Hisashi said over his and Gaara's now tri-weekly tea time. "you can do whatever you want to your children, just treat them the way you want to be treated."
Finally Hisashi said something of worth.
Author's Note: Sorry that I didn't put one up yesterday, I was at a party. So today there will be two.