Borderlines create the vicious circles they fear most. They become angry and drive the relationship to the breaking point, then switch to a posture of helplessness and contrition, beg for reconciliation. If both parties are equally enmeshed, chaos and conflict become the soul of the relationship.
Comic book fans have loved Wolverine, and all the 'X-Men' characters, for more than the action. I think that's what set it apart from many of the other comic books. In the case of Wolverine, when he appeared, he was a revolution really. He was the first anti-hero.