Try having that person who wants to shoot any buck, even though they've killed a boatload in thier time be your Dad, who is also your best hunting/fishing partner, best friend, and have a bond as tight as any father and son. Makes for some interesting conversations sometimes.
I've tried everything I can to nudge him along, including leading by example, even before AR's started. He's so frustrated with not being able to shoot any ol buck, that he hardly hunted at all last year. I don't understand him, and I've tried really hard. At least he hasn't found a reason to stop fishing