I'm sorry if this has already been asked, but I was wondering how much backstory you do for your characters. I'm just curious to compare methods. Do you write all the backstory first, and then do the script, or write backstory as you go along, or save it to the end, etc? I'm sorry if this isn't phrased correctly.
This is my opinion on "backstory."
Personally, I don't believe that there's really any such thing as backstory.
There's only "story."
If something in a character's past is relevant to what's going on on screen, if it's going to show up in some fashion, then it's part of the story.
And if it isn't -- who cares?
Because (and I know a lot of people disagree with this) -- your characters come into existence when they are first introduced all in CAPS on the first page when they show up, and they all cease to exist on the last page of your screenplay (barring sequels).
That hundred pages or so, for the reader and ultimately, if the movie gets made, for the viewer, is the some total of that character's existence.
If, in the course of that hundred pages, you choose a collection of specific details and behaviors that indicate a character's past -- then that handful of details and behaviors is all the past that that character has.
You may have made up a detailed biography of who his parents were and where he went to school and who he dated and all the rest -- and if you, as a writer, need that stuff, in the same way that an architect needs to construct a supporting framework in order to build an arch -- then by all means build it.
But in the end, you have to realize that all that supporting timber is going to be stripped away and the arch has to stand on its own -- and the arch, without all that supporting stuff is all that anyone will ever see.
Now, that supporting structure may have been a brilliant of architecture in itself.
But in the end -- who really cares? For that matter, if you can build the arch without any supporting structure, so be it.
In the end, the arch -- the story itself -- is what matters.
What you need to do -- how much supporting structure you may need to get there is strictly a matter of your process. Some people need a lot, others very little.
You just need to remember to remain focused on what's important, which is the end result which, depending on the story you're telling, may require a great deal of history for its characters, or very little. And it's not as if one kind of story is intrinsically better than another kind.
NMS