Ok.
I'll join in 😁 my favourite hashtags include:

#CaffeineClub (I was the first on coso to use it)
#FoodPr0n or #Foodpron
#CosoMusic
#CosoMusicians
#SongForCoso
#Eurovision
#Bandcamp and #BandcampFriday
#CosoCuties
#Ukraine (particularly when @Render is posting his updates)
#religion so long as conversations remain respectful.
#CosoAfterDark
#SomeSay (taking the piss out of @th3j35t3r)

and finally, my favourite invention, the entirely meaningless but often hilarious #LemmingMyMelons 😜