I love when I watch movies with hostages and they give this long speech of how their going to kill somebody or wait a little longer and say they’ll start killing people.
If you honestly were a cold killer, you stall or feel remorse. You would straight up say I’m killing somebody then shoot someone at random at that instant. That are the characters that I enjoy cause they were too messed up to have sentiment for another life. They literally just kill to kill.
Unless you have a thing like the joker or Hannibal.