So, I am working on the background of my protagonist for a story I recently envisioned. So far he is a vigilante of sorts that searches for evil men across his world with the desire to kill them once he finds them. As I write his history, I ask myself, "why does he do this? why is he not normal?" The main theme of the story will be love and hatred, so the most obvious answer is because his true love was killed by an evil man once. But this seems oh so cliche to me, as we see this in almost every story where a man turns to vigilantism. So, can anyone offer up any ideas for an interesting twist on why this man does what he does? The story is still very wide open, so I can work with almost any idea you throw at me.