An incomplete list of my (incredibly British) Biscuit Related Headcanons apparently
[Roughly ordered by inception]
Vetinari likes custard creams
Drumknott's favourites are bourbons
If you leave Sam Vimes alone in a room with an open packet of chocolate hobnobs, there will not be any chocolate hobnobs left by the time you get back
The same applies to Moist and a packet of party rings (he is not to be trusted at children's birthday parties)
Sybil stubbornly refuses to feel anything but pride for the secret stash of rich tea fingers she keeps in her nightstand, a habit she's held since childhood
Carrot really likes digestive biscuits
Drumknott can fit the entirety of a full-sized jammie dodger into his mouth at once-- but he refuses to demonstrate this to company