when people write headcanons for hp’s next generation i think they usually forget these are post war children and they can be so much more interesting. their parents, family and everyone around them have all been to war and have lost too much. that’s not to say that they can’t be happy or won’t ever have fun, but this is the kind of thing that leaves scars and trauma. i don’t think it would be the case in canon because jkr is a bad writer but thinking about characterization these kids don’t always have a good time at home, their years have too many days dedicated to mourn. they didn’t lost anyone themselves, but somehow grief has been around ever since they were born. they probably struggle to get through holidays and see hogwarts as a way to escape this reality because family can be a lot even when they love each other. maybe fred the second doesn’t prank around because his father taught him or it’s on his blood. he does pranks because he thinks his father’s actually a bit strict and it’s not having enough fun. maybe he doesn’t get why his father of all people would work on the funniest place in the world. he feels like it’s his job to make the house happier and to make everyone smile because realistically talking, george had a rough time without fred i and it changed him. he probably put too much expectations on his first child, named after the person he lost. he’d probably expect fred to be exactly like his brother and got frustrated when he wasn’t and what child wants to disappoint their parent.