Aaron is Task Force Valkyrie (which he loves to tell people he meets on the street . . . seeing as how he's a secret agent and all).
I'm actually part of the Lucifuge Conspiracy because I thought it sounded ridiculously hardcore. I perform good deeds in order for Lucifer to return to heaven. My character is much more kind than Constantine, but I modeled him after John.
My friend Rich and I refer to the movie as "Keanutine." What's so sad about that movie is the fact that it basically acknowledges some of the things from the comics so you know they fucking read them, but they stripped everything out. I mean, "League of Extraordinary Gentlemen" was absolute shit but they also wrote the movie without looking at the comic because they optioned the film at the same time. You can at least make some sort of excuse for it being so shitty (also, James Robinson wrote it and let's face it, Starman and the Golden Age will be the only two good things the man has ever written), but Constantine has no excuse because they pulled from the source material.
To me, Brian Azzarello's run is the ultimate version of Constantine. It is perfect. I love all of him though. The Ennis run began with a huge fucking bang and I hate that Ellis couldn't go longer than 12 issues. Neil Gaiman had a great one issue story and Grant Morrison's two issues were some of the coolest stuff I've ever read (the Nuclear Symbol is symbolic of the Godhead? Fucking nuts!)
Anyway, I could go on all day, so I'll end it here.