So the discussion for today: what determines which personality trait is dominant in a given Madrox duplicate?
In my head, I picture that Madrox's head is filled with all these different traits, and when he gets ready to make a dupe, there's a rush amongst to be the lead dog, the first one into that body to assert control.
My other theory is it's dependent on his dominant emotional state at the moment the dupe is created. When Monet punches Jamie in the face out of the blue in #4, the dupe is hyper-aggressive, wanting to brawl, first with Monet, then turning on Madrox, and yelling at him for being so indecisive. While shock might be a more natural response to a coworker abruptly punching you in the chops, anger is not out of the question.
#10, we learn Jamie got wasted, bumped into a wall and made a Hefner-dupe, which seduced Monet (we think). Fairly reasonable that getting wasted, probably with Siryn, put Jamie in the mood for love, and so you get a dupe with similar ambitions, but a different subject of interest.
Man, it sounds creepy when I say it like that. Let's say "different target of his affections". That sounds a little better.
When Tryp confronts X-Factor with his future, Jamie's accidentally creates a dupe. One that just so happens to remember what really happened to Jamie's parents. Not surprisingly, this dupe opts to strike back, and blows the building (and two of the Tryps) right to hell.
Finally, we have the moment in #14 when Monet confronted Jamie, and starts pounding him against he wall, trying to release the Hefner-dupe that seduced her (we think). Jamie, already spooked by Theresa's remark that she has to whisper or she'll freak out and start destroying things, is seriously worried about Monet doing him physical harm. And lo and behold, the first duplicate out of the box is apologizing and pleading for forgiveness.
Just a thought.