honestly? The real sweet spot is still AO3 by a mile. The tagging system means you can filter out the weird AUs that don't work for them and find exactly the mood you want—angsty Shadow World aftermath, post-game domestic fluff, or even the rare high-school romance that doesn't feel forced.
FF.net has a bigger archive, but it's a total minefield. You gotta sift through a lot of dead links, weird formatting from 2010, and stories where Chie is just... a violent caricature. Some classics are buried there, though, like 'Scattered Leaves' which nails their competitive-but-caring vibe.
There's also a surprisingly active corner on SpaceBattles and Sufficient Velocity forums if you're into more analytical, character-study focused pieces. Those writers really dig into their shared insecurities and how they'd actually communicate. It's less pure romance sometimes, but feels truer to the game's tone. My bookmark folders are a mess across all these sites, really.