I commented yesterday that I totally wasn't addicted to Post-Hell-Issues!Dean and could stop any time I wanted. I lied.
1. Fics where there is some kind of benefit to Dean's time in Hell, even if it isn't taken as one-- Demons, etc. being afraid of Dean, given his former status as Alastair's protégé; an unreasonable pain tolerance (I can so picture Sam or Bobby being really freaked out by this); using an "I've been to Hell and back" speech for intimidation (I've read a fic where Sam did this, and it was skull-shatteringly cool), and so forth.
(And ooh, what if even Ruby was on edge when it came to Dean?)
2. Given the sheer length of time he spent in the Pit, I'd wager Dean might have some trouble adjusting. Forgetting that torture isn't really acceptable topside? Having his time topside be a distant memory, so he'd have trouble recalling everything, even perhaps tingeing reunions with nostalgia?
3. I'm looking for just about any Harry Potter crossover that involves some sort of magical mishap delving into Dean's time in Hell. i.e., an Alastair boggart; an instance of legilimency gone horribly wrong; Crucio rendered laughable, etc. Even if it's just one scene in a larger fic. "Changing Circumstances" by EclipseWing did this well.
4. Okay, this one's a long shot. One of my favorite- but sadly abandoned-
fics involved a Hell-traumatized Dean waking up in his teenaged body, and being unable to hide that fact from John and Sam.
Another was written for the prompt, "
Dean dreams of Hell. He is 10 years old." D'you see where I'm going with this?
I prefer no slash, but I could tough out minor Dean/Cas if it's reeeally good. (Dean/Alastair is okay, because I really wouldn't put it past the bastard.)