Fanfiction has been my guilty pleasure for years, and I've stumbled upon some absolute gems in the most unexpected corners of the internet. Archive of Our Own (AO3) is my go-to—it's a massive, well-organized repository where you can filter by fandom, tropes, even word count. The tagging system is a lifesaver when I'm craving something hyper-specific, like 'coffee shop AUs' or 'enemies to lovers.'
For older fandoms or niche pairings, FanFiction.net still holds up surprisingly well, though the interface feels a bit dated. Wattpad’s another option, though you’ll need to sift through more amateur writing to find polished works. Pro tip: follow rec lists on Tumblr or Twitter—fellow fans often curate themed collections that lead you to hidden masterpieces.