We love a good family group chat - we have loads!
One with mum and us kids (most used, every single day! Memes, banter, checking in, food orders etc)
One with dad and daughters (here and there, mainly my dad updating us on the weather condition and road closures

)
One with mum and all extended family (just banter and hbd's when they come around)
One with my sisters and close cousins (a general gossip/talk chat/usually every day)
The same group as above with rated R without minors (dating life debacles, tinder and all that
witchy stuff. Been pretty dry recently)
One with just my cousins in the same city as us (for general meetups, check ins etc)
Honestly, I have SO many! I'm really blessed with the family I have.
But I love them all. I don't join any groups if I don't like the people in them. Uni groups chats used to do my head in omg.
EDIT: Just to add, none of us "kids" are married yet so I'm scared reading some of these comments as I hope our dynamics don't change! I'll happily add anyone to a group if they want to be in it and we're family!