In other words: I come to HN because I'm a programmer and love technology, I come to X because I'm a writer and love language. What are some good values for X?
LitHub looks interesting but it's more of a publication than a forum, yeah?
Definitely, although it does have some forum-style characteristics. TTBOMK, there isn't an exact equivalent of HN for literature lovers, and that's likely due to the target demographic.