Personally, if you do write an AU or Post War Draco, you must

• Deal with the ethics of the war
• Treat him carefully while in character

Post War Draco is like 616 Tony Stark, a reformed but still not that good person who deals with ethics and possibly trauma. He is still a jerk at times, but nicer than in his teenage years. Post War Draco is hard to write in my opinion

 

He's a character you can reasonably take in quite a number of different ways.

Does he become redeemed? Does he become withdrawn and bitter? Does he go overboard to seek forgiveness, and become an oppressively good person? Does he maintain he was in the right all along, and never did anything wrong? Does he claim victimhood, and seek sympathy?

These are only some of the ways you could choose to write him following the conclusion of DH, any of them can lead to an interesting character.

 

Dead or in prison are the only options I enjoy. Katie Bell suing his ass would be a good post war fic.

 

I absolutely loved how he was handled by Ruskbyte in All Problems Solved. If you haven't read it be advised it's a sequel to Evil be thou my good. Everyone's past and character has a habit of catching up to them. Even a Wizard's.

 

I'm of the opinion that Draco was, and still is, primarily concerned with himself and his close circle, and that that doesn't change post-war, just his relationship to everyone that isn't in his close circle. I usually write him as someone that gives much more leeway to muggleborns and half-bloods by necessity and a bit of perspective change/mellowing, but also as someone who can do so because he wasn't very attached to pureblood ideaology just pureblood culture. Ultimately, if he and his can be generally left alone, he'll be fine. It's if you write the plot of the fic as one that will directly confront him do you see the uglier parts of things I highly doubt he'd confront or interrogate about himself post-war. As a general personality template, I generally write him as a blasé jackass uninterested in the things that don't affect him unless forced to, but not in-your-face about it. If he's a secondary antagonist, he devolves (generally), and if he's the protagonist or deuteragonist, he does successfully work into a bit less of a middling shitty person.