As it says above this is a site with fic recommendations for people (mainly) over the age of 18. Fandoms I read currently include just Harry Potter and Criminal Minds. My age limit/rec is based on my preference for fiction with sex and/or violence.
The next thing I need to underline is that I own next to nothing - Harry Potter and Criminal Minds (including but not limited to all the glorious characters) are NOT my property and to find out all the people and companies who do own you have to do the googling yourself. Unless of course if someone high and mighty informs me that I do in fact need to put up a list of those fortunate ones, in which case I'll do it.
Before starting with the rec lists, here's a quick overview of the things that rock my fictitious boat:
Tightrope by nebula99
It's been a while since I read this one... It's a really good hurt/comfort with some "to be or not to be" and that's just about all I can remember about it. Should probably read it again, eh? This one's an adults only or NC-17.Salad Days by nebula99
White Lies by cause.A.scene
This is a casefic with some violence (not too bad) and h/c. Reid gets caught up in the middle of an attempted bankrobbery and tries to do something about it. It alternates between Reid's pov inside the bank and Hotch's pov on the outside.
Icarus Falls by AhmoseInarus or hatochiisai
In this casefic Reid has to go undercover as a highschool kid. Rated NC-17 for violence and non-con. We have a clever!Reidbut also angsty/gets-caught-up-in-the-case!Reid. There's not that much of the rest of the team.
The Mind Is A Treacherous Thing by Eligent
"The Berkview Institute for the Criminally Insane is hell on earth and Reid's new home." To say more about the plot would ruin part of the fic for you. Rated T, drama/angst, includes violence.
College Sweethearts by TheKnittingLady
The team gets a case that links with Reid's past. Almost 20,000 words, hurt/comfort, angst, lots of violence (abuse) but I'm almost certain the rapes aren't described in much detail (again, been a little while since I read this). This fic is definitely NOT for those faint of heart, NC-17 and not pretty (well there are sweet moments too, Reid/OFC romance). The story has a sequel, The Long Road to which mostly the same warnings apply but there's more h/c.
Hunger by Eligent
33,700 words. "When someone is coming for one of their own, the whole team hurts, which the BAU painfully learns as an unsub seeks revenge in the deadliest way." Reid and Morgan are affected, the fic's Reid-centric. Drama/angst (insecurity), Reid's traumatised and can't eat. Rated T for some violence.
Secrets Are Walls That Keep Us Alone by procrastin8or951
I don't generally like to read Marauder fics but the subject got me in. What we have here is a story in which young Sirius (age 16) develops an eating disorder as a result of parental abuse.The fic isn't awesome but it's good and I found Sirius' issues believable. Warnings: Contains eating disorders, abuse, violence, depression, minor language, mention of drugs.130,000 words divided into 74 chapters. The abuse got kind of much even for me (okay, I'm not overly callous, I hated watching Sin City) so the warning for violence shouldn't be dissed.
Thirteen by minnow_53
In this AU fic Remus is with Sirius but he's also a paedophile into little girls. It's well written, chilling rather than sexy. An interesting read that differs quite a bit from the mainstream of HP fanfiction, quite realistic. Warnings quoted from the author: AU, chan, dub con/non con, het, demonising of a beloved HP character... This is far from being a fluffy R/S story, and some people could find it offensive.
The summary by author combined with the warning will suffice: Even a brief stay in Azkaban for Harry will be disastrous. Graphically described well-written sickening non-con oneshot, NC-17.
Detention Served by Amanuensis
Snape gives the 11-year-old Harry detention NC-17 style. Warnings: non-con, chan, PWP oneshot. Worth recommending for those who can stomach the genre.
Tea Time by novembersnow
This is a set of ten 100-word Remus-centric drabbles. There's Remus/Sirius slash but it's PG. Tea Time is sweet, I'm a little bit relieved to notice that I do actually enjoy reading nice stuff too, not just torture.
A sweet teenage Remus/Sirius, some 28,000 words, T or NC-17 for couple of scenes for sex.
Another sweet and well-written Sirius/Remus, PG-13, 8,000 words.