Few more suggestions
"Looks like I have inherited the family flaw - hey, are you calling the kettle black?"
"Tried suggesting that already but...
.... one word from me and he does as he pleases"
... goes in one ear, out the other"
... it's like water off a duck's back"
"Yep, I could certainly use one of those, thank goodness my birthday/Christmas is coming ... look forward to opening your present to me"
"I heard that was genetic - what in your experience works the best?"
"Heck yes ... but only if you're shouting"
"I'm thinking someone got out the wrong side of bed this morning ... are you feeling a bit grumpy today, can I give you a hug"
"Thank goodness we aren't all the same and my/his talents are in other departments such as ...."