For everyone that uses quotes in "story"...
My players come to the table for the story. If we wanted to play a no-story game, we'd haul out Axis & allies.
That said, my game is run like a TV show. Episodes, seasons, and lots of story. You will note that Hercules, Iolus, Xena, and Gabrielle all somehow survived to the end of the series. At our table, Death is a dramatic event, fully agreed to and often planned in advance by the players, usually to try out a new character concept.
Simply put: Any DM who askes for "sufficient background" is like a boss wh expects you to work overtime for free. Its not right, and its not fair. There's better use for someone's creative writing skills than random nameless canon fodder. If I knew a DM allowed the dice to work their will, no way in hell is he even getting a last name for my guy. And it will be My Guy. I'm not going to put any work into a personality or even a sense of identification with my playing piece if I know he's just "the next slab of meat" in any random encounter.