[Dr. Boogie]

That interview has him saying that he understands the basics of the character: he's a homicidal vigilante with a military background. In all the different interpretations of the Punisher, that much appears to remain constant, so I'd saying knowing that much gives you a pretty good understanding of the character, as well as where to take him.

Which writer's interpretation of the Punisher do you believe to be most accurate?

Edit: Also, Ennis says right in the article that the Punisher already got his revenge on the people who killed his family. He says it in a bit of a wishy-washy fashion, but he still acknowledges it.