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 
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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
Have you tried making the Messiah hexagonal?
Vitruvian man with a cross in the background.
I just want to share my favourite emote combo (that’s on topic)
Turns chair around “You know, someone else once harbored an owl who pissed on things”