Maybe it is more than an instance. Maybe it is an idea, a world-historical vanguard, light itself. 
actual attempt to answer (cringe)
We’ve been around for three years on a lemmy fork before federation. The lack of federation for years as well as the place we splintered off from (/r/chapotraphouse) already having a unique microculture within Reddit has given this instance, in my opinion, a distinct culture compared to general-purpose and even other hobbyist instances.
Regarding specifics, Hexbear is a vehemently queer-friendly/intersectional anti-sectarian socialist instance. Check us out 
Whenever Hexbears not on thread, all the other posters should be asking, “where’s Hexbear?”
(baby talking) “Where’s the Hexbear? There she is!”
:theres-my-Chippy:
Everyone is saying “Hexbear this” and “Hexbear that”. But no one is saying “Worship this” and “Jericho that”.
Youth pastor voice: Gosh, everyone is talking about Hexbear, but did you know who else stirred up a bit of trouble in his day…?
These folks at Hexbear are always saying, check out this dope ass bear, but have they taken a second to check out this dope ass Messiah?
These folks at Hexbear sure like their shit on pigs balls. Haha, but you know where else you can learn about pork being unclean? The bible
I just want to share my favourite emote combo (that’s on topic)
The best part is I think they already do
i have seen many times a .world user post something about china there is like 5 users from diferent instances talking about how “they cant wait for those hexbears to defend the cpc and spam emotes” we live rent free in their heads
They wouldn’t say CPC tho
I’m only too happy to oblige tho
Always goes through my mind and makes threads on .world less interesting.