AU: Castiel gets creative when he’s horny. And Dean loves it.
“Uh-huh, you have this look on your face again. What are you up to?”
“Well, I have some ideas…”
“Hmm.”
“I want to try something new. I think you will like it.”
“What are you doing? Fucking— God, you’re one hell of a kinky bastard, aren’t you?”
“Stop blaspheming.”
“Make me.”
AU: Team Free Will tries to stop the Mishapocalypse.
Dean: What the hell is going on?
Sam: I have no idea. I thought we already stopped the Apocalypse.
Castiel: This is something different. We don’t even know what these creatures are.
Dean: And they all look like Cas, man, this is fucking weird.
Castiel: They do not look like me, they look like Jimmy.
Dean: Yeah, whatever.
Sam: We should call Bobby. It’s just getting worse and worse.
AU: Castiel shows his wings to Dean.
“I don’t understand why do you want to see them so much.”
“Isn’t it obvious? Come on, Cas, you said it’s possible because of that… profound bond or whatever it’s called.”
“It is true.”
“So, why don’t you let me…?”
“My wings are not… as impressive as Michael’s or Raphael’s once were.”
“But I don’t care about their wings, Cas. I want to see yours.”
“Okay, then… And? I told you, they are not…”
“They’re perfect.”
“Really?”
”Yeah. Can I touch them?”
AU “THE GHOST OF EMBERS”: Dean, determined not to let his pyrophobia or his anxiety over his absent brother ruin him, and desirous of a change that just might fix everything, makes the rashest move of his adult life: a largely unnecessary, almost entirely unplanned move to New York City. Stuck in the middle of a city that has a reputation for chewing up and spitting out the unprepared, Dean’s anxieties fluctuate between bad and worse…until he starts to get to know his mysterious and antisocial next door neighbor, Castiel. But mystery isn’t always a good thing; Castiel is hiding a secret…a secret that even the cynical Dean Winchester might have trouble believing.
“Do you believe in second chances?”
AU SERIES: FRIEND OF MINE - PART 16
Castiel really enjoys mornings with Dean.
“Morning, sunshine. Where’s your peach fuzz?”
“It’s not a… I shaved it.”
“I kinda liked it, I guess. You want breakfast?”
“Breakfast?”
“Well, yeah, I made some burgers.”
“I’m impressed. I thought you can’t cook.”
“Of course I can. I just… don’t do it often. And? What do you think?”
“This is delicious, Dean.”
“Good. I made them for you, ‘cause, like, burgers are your favourite food, right? And yesterday you came back from work exhausted, and I thought it’s a good idea…”
“I truly love you, Dean Winchester.”
“I know. I love you too.”
AU SERIES: FRIEND OF MINE - PART 15
Dean and Castiel’s first Christmas in their new home.
“Geez, the last time I saw so many lights was on Fourth of July.”
“I still think we need more fairy lights…”
“Dude, no. This is already too much. Besides, it’s too late, next time we’re gonna decorate that damn tree earlier.”
“You’re right, Sam and Gabriel will come soon. I invited Anna and Ruby as well.”
“Well, I’ll finally get to meet her. Gabe keeps saying she’s scary.”
“Don’t worry, she’s not so bad.”
“Good. Have to say, I’ve never been so happy about Christmas before.”
“Me too. You make me very happy.”
“Aww, such a sap. Merry Christmas, Cas.”
“Merry Christmas, Dean.”

All my AUs, in one place, segregated by categories with summaries. Hell yeah!
DESTIEL
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J2
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INIASTIEL
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NON-SHIP
AU [based on “The Hangover” movie]: Sam and Jessica are about to get married. Two days before the wedding, Sam, Dean and Cas drive to Las Vegas for a bachelor party they’ll never forget. But, as it turns out, the next day they don’t remember a thing and Sam is nowhere to be found. But they find out other interesting things instead.
“What happened?”
“I’m not sure, I don’t remember much.”
“And why the hell I have a wedding ring on my finger?!”
“I believe we got married.”
“What?”
“I have the same ring and I found in my pocket our… wedding picture. We looked happy.”
“Okay, I have a fucking headache. We’re gonna talk about this later. Now, we need to find Sam. Jess is gonna kill me!”
AU SERIES: FRIEND OF MINE - PART 14
Dean and Castiel find their own place to live and share this news with Sam.
Sam: Finally!
Dean: Sammy, you hurt my feelings. You’re way to happy about me moving out.
Sam: Can you blame me? I will be able to sleep at night without hearing you and Cas. Especially Cas.
Castiel: I don’t understand…
Dean: Sometimes you’re a little too loud, Huggybear.
Castiel: Oh.
Dean: But you do know how much I love it, don’t you?
Sam: Okay, enough. I have to admit - it’s… strange. You. Moving Out. It’s gonna be weird not having you around.
Dean: Dude, you know it’s gonna take you, like, fifteen minutes to visit me? Us? My and Cas’ house is really close.
Sam: But still, this isn’t the same!
Dean: Aww, such a big girl. You better help us with all that crap. I’m horrible at packing.
Castiel: Gabriel said he can help us.
Dean: Really? Since when he’s so helpful?
Castiel: Anna’s practically living in Ruby’s place, so I think he wants our flat just for himself as soon as possible.
Dean: Let me guess - and the first thing he’s gonna do after that is calling Sam, invite him and sex him up?
Sam: I like that plan. So much.
Dean: Ughh, no more details. Bitch.
Sam: You started it. Jerk.
AU “HAVE LOVE, WILL TRAVEL”: Castiel Novak is a reclusive writer with a childhood so tragic it’s left him terrified to leave his home—until his overbearing brother, Gabriel, drags him out for a night on the town full of booze and strip clubs, and he encounters Dean Winchester, a mesmerizing and mysterious stripper with secrets of his own.
“I think it’s good that I’m your favorite human, because you’re my favorite angel…with a badass right hook.”