A word that always comes up when describing writers, especially new writers, is VOICE. It's sort of hard to explain now that I'm trying to do it, but your style, perspective, attitude, characters, themes, influences (and probably much more) all add up to your voice. Who you are as a writer. If you're funny or serious - and what kind of funny or serious. Where you fit on the spectrum between Forgetting Sarah Marshall (which, btw, was funny but kind of forgettable) and There Will Be Blood. Sometimes it kinda sucks because the one script of yours that people read will be the representation of who you are. If all goes well you'll get a meeting and get to show them more about you, but really, your talents have to shine off the page.
I think it can be difficult to write with all of this in mind. I kinda want to keep it simple and just write a good story with good characters. But I know my writing needs to make an impression. Am I making the right one? I want people to read me and get what I'm about. That life is hilarious and tragic. That people are impossibly complex and interesting. That we make bad decisions despite ourselves. That there is poetry in everything - and bullshit in everyone.
Maybe you can't really try to create your voice. Maybe it's just there naturally. I just hope that if people start listening, they're hearing what I want them to hear.