You might be a writer if you see someone on a TV show exploring their backstory with another person and theorize correctly that they'd be killed near the end of the episode-- no matter how good the writing is. ((This happened to me with a recent episode of Fringe.))
You might be a writer if you can only go so long enjoying something made by someone else before having the urge to create something yourself.
You might be a writer if you watch a TV show and think the ending you were guessing at was much better than the one they showed.
You might be a writer if you... write down things people say so that characters can say them later. You might be a writer if you... have computer neck from peering at a keyboard. (On the other hand, you might be a CS nerd. My brother and I are both prone to computer neck, but for totally different reasons.) You might be a writer if you write. Off topic, you might be a Latin geek if you order your sentences funny. Often in order that myself I might amuse sentences my I reword as if Latin they were.
You might be a writer if you are a frequent visitor at www.behindthename.com You might be a writer if you take personality tests online to test your characters, and not yourself. You might be a writer if you can't understand how people can run out of words. You might be a writer if you can't understand why all others around you seem to lack fantasy. You might be a writer if you prefer your own company.
You might be a writer if the idea of never writing again, or never being able to write again, fills you with horror.
You might be a writer if you find a quote from a book you like and instantly write it down on a piece of paper; it doesn't even matter if you ever look at that quote again.
You might be a writer if you've resorted to writing on napkins, toliet paper, receipts, etc. You might be a writer if you have spent hours looking for a writing utensil, or anything that could resemble one, on that horrifying occasion you actually forgot to stuff one in a pocket.
You might be a writer if you absconded with an old, dry-erase soup menu in lieu of a whiteboard. Or maybe you're just a cheapskate.
You might be a writer if you have to rewatch scenes in movies because you got distracted by an idea for a book the scene gave you.
You might be a writer if every time someone really annoys you, you plot how you can write them into your next book, where they'll get their comeuppance Or is that just me? Haha, guilty
You might be a writer if... you have that one special pen you always carry with you, even if there's not a single sheet of paper anywhere around.
Guilty - same with quotes I overhear. People say some odd things. You might be a writer if you get excited about buying really nice notebooks.
I love notebooks. You might be a writer if... ...you grew up viewing most of your life from behind a book. ...The average amount of books the other kids planned to read for the "readathon" at primary school was a smidgen of the amount that you'd have read that week regardless of whether you were being sponsored or not. ...when you listen to music you see scenes from your story play out in your head.
Is there any other way to listen to music? You might be a writer if... You can spot a grammar error within seconds of looking at a paper, but you can't find your wallet sitting right in front of you.