I've been thoroughly enjoying building a vast catacomb in which to inter the (very, very many) dwarves who have died from my fortress's wars, weremammoth-related situations, bursts of insanity and gravity. I thought it would be nice to inter them in family tombs with statues of their deities, all their pets and a few grave goods of their favourite stuff, but the inability to view the dwarf's old Relationships and Thoughts and Preferences screens mean I can't look up what these things were.
Of course, if we were to go full Ancient Egyptian on this, there'd be a setting selectable on a coffin something like this:
a) Make tomb
b) Make family tomb
Selecting either would open a yes/no option to "Inter grave goods?"
The ghosts of particularly greedy dwarves will be angered if buried with an insufficient value of goods and wander around smashing things until they are suitably propitiated.
"Make family tomb" would enable an area selection which would designate all other coffins in the area for family members and pets of the tomb owner.
If there are not enough coffins for the current family and friends roster, an "Insufficient coffins" warning is generated, and anyone who doesn't have a coffin in the tomb at the time of their death will have to be buried elsewhere. This may cause the ghost of the tomb owner to rise and steal the corpse, dragging it back to their tomb and dumping it on the floor.
If a dwarf's spouse has remarried after their death and they are buried in a different family tomb, this may cause fun.