it's not that unique.
The fanart isnt always great either, but people, both good and bad at it, usually lose steam with visual art and stop posting art, unless it's something they deem is incredible. then they decide to post.
But fanfic writers can go on and on and on...
It's not that the board prefer visual over written, it's just that visual artist seem to filter themselves out more.
Like Roy says, you can tell us about it, link to it, announce that you're gonna PM it to anyone intested... just dont post the entire thing.