Okay, so if you're hunting for Roz x Fink stuff, you're probably coming from something like 'The Owl House' fandom, right? That pairing doesn't have the massive archive some others do, so your options are a bit more focused. Honestly, Archive of Our Own (AO3) is going to be your main hub. The tagging system is a lifesaver for finding specific dynamics—you can filter for Roz/Fink or just browse the fandom tag and sort by the relationship. The quality there tends to be higher on average, and you get a mix of everything from short fluff to longer character studies. Wattpad can have some gems too, but it's more of a mixed bag; the search function is less precise, so you have to wade through more unrelated content. Sometimes you find a real heartfelt story there that hasn't migrated to AO3, though.
I'd also recommend checking Tumblr. A lot of writers, especially for smaller pairings, post drabbles, headcanons, and shorter fics directly on their blogs. Using tags like '#roz x fink' or '#fink x roz' can surface stuff that never makes it to the bigger archives. The interaction is different—more immediate, sometimes with asks and continuations right in the notes. Don't sleep on fanfiction.net either; it's older and the interface shows its age, but there's a stubborn archive of stories that never got ported over. For this specific ship, you might find some older, completed works there that capture a different vibe from when the show was first airing. Discord servers dedicated to the fandom are another good shout. They often have dedicated fic-sharing channels where people drop links to their work or do prompt fills. It's more community-driven and you can sometimes even chat with the authors. Honestly, the 'best' platform depends on what you're after: AO3 for curated depth, Tumblr/Discord for community and spontaneity, and a quick scour of the others to make sure you don't miss a hidden favorite.