Is there a film or director or writer you love and you have snuck in a homeage to them in a script? I used the launch code from wargames once.
Or is there a name you always use in a script? Could be name of person or a fictional town or name of a business etc? What other tell tales or nuances would we see in a script that would make us thinks "yep, that's a (insert your name here) script....assuming you become successful and have lots of films made.
The name Barto shows up a lot in my scripts. He was an actor I met in college and a good friend who passed away very young. On the lighter side whenever I just need generic names for crowds or lists I tend to go back to the cast and characters of Guiding Light.
A lot of film makers do sneak something in as an homage to others they admire, but very few use something others have to say something new and/or critical.
Pete, I referred to the 1982 movie "Frances" when I wrote "Bleeding Gums." (In "Gums," the Duchesne Academy Jazz Band spent spring break in Seattle...the city that gave us not only Jimi Hendrix and Carol Channing, but also "Frances'" title character, 1930s movie star Frances Farmer.)
I have a demonic villain in the script I'm working on currently who speaks in pop culture references(movie quotes etc) to mess with his victims.