I don't know how much we differ from other communities. I think the main pull is the fact that we have such a large spread of newbies, regulars and extremely bitter vets that no one feels unwelcome. Unlike other ridiculous niches of the internet like 4Chan and such we're also not bogged down by (too many) inside jokes and nonsensical codes of conduct. It also helps that we're all like-minded people due to our love of the FF series, so that certainly allows us to mingle better.
But when it comes down to it, we're all here to just have fun.