Only use it to find specific fanfic stories of Anime I watched. The bigger the fandom, the more good stuff, and even more shitty stories there.
Kinda sad to see stories with good premise and high quality writing getting abandoned, since fanfic is free and it's just unsustainable for mere amaetur writers to spend more on the story.
I always cringed when reading Crossover stories. When you're having quite deep understanding of both part of stories (ex Naruto and Bleach), most stories will just look like heap of trash since they're just like kids playing Barbie doll fight against transformers robot while each doll use either Kamehameha or hadoken.
It's definitely not that obviously chaotic for most people, but it is for me since I'm rather perfectionist and sensitive with bad plot development and lore breaking story. Especially when character start goes out of character to fulfill author's biased opinion and shitty agendas, ugh. Not to mention the appearance of Fanon that probably destroy everything that makes the story good and realistic.
I don't really like to suffer 10 bad stories just to read 1 or 2 good ones, much less 100 to 1000 shit ones.
So yeah, I stop reading on FF.net and move to reading stories on AO3 for better tagging system.