Your question strikes at the very heart of the writing experience.... do we only ever write ourselves into our creations or do we consciously choose an alternative route and try to write something other than ourselves and our own experience?
Now, many people will
argue that no matter how hard you try to write outside yourself....
YOU are in every single piece you write. And I sincerely hope so...
it is your creative energy that makes a piece/or character 'live' and
breathe on it's own.
BUT to answer (or attempt to) your question. Whether you actively
choose to write characters (& I think we're referring to main
characters here) whose emotional 'toolbox' or psychological makeup is
radically different than yours is really immaterial. You may write incredibly intense but self- contained characters that really
challenge actors to dig deep to express ALL these characters ARE with
just a few small gestures - because that's who you are. OR you may
study minutely the mannerisms of people you meet that are LIKE the character you
want to create.... and bring life to a character on the page that
mirrors those mannerisms - even though they are not your own.
You don't have to be a wildly emotional person to create that kind of
character on the page. But your characters' emotions need to come from
a REAL place inside of you that allows you to project all of the
nuances of that person. So you make a study of people you meet that
are like your character...and build on that - starting first and
foremost with actual emotions - love, hate, anger, jealousy. But I
want to reiterate - wildly emotional or intensely withheld doesn't
matter.... write what suits the character and the STORY you're creating.
And if you choose to focus on a particular 'type' of character.... and
you create a series of films about people who are bright, articulate
and very considered with their emotional displays.... actors &
audiences will still love them IF they are well drawn and bring us
stories that illuminate for us something of our own lives.
I hope this helps. And I do wish you luck with your screenplay . I’d love to read your work at Wordsmythe.ca