I'd suggest perusing through the fan-fiction section yourself, since there's a thread dedicated to the organization of all of the stories there. But since you're here:
You can search through the tags in
this thread with each story and maybe something that interests you will pop up. Otherwise, 'dark and twisted' hits close to home with Doomish's work, even though you'll have to download it.
tl;dr
>go to thread
>ctrl+f
>doomish
edit: guest poster beat me to the punch.