Why do people sometimes say, what is your favorite movie?

"You can narrow that list down to movies starring me. Well... Ricki and the Flash was 2015, but you should all check it out."

Why not after 2013? That's silly.

Polite conversation.

I have been asked that many times and I have asked it.

It's a way to get to know someone a little better.

I'm not sure if it says anything about a person necessarily but films are always fun to talk about.

Hopefully you're just being silly.  If you're trying to be clever you're not doing a good job.  In fact if you are proposing that movie must be applied only to the art form where an image, (i.e. a single visual perception, such as a photograph or other two-dimensional picture, that resembles a subject—usually a physical object—and thus provides a depiction of it,)is moving then wouldn't film fit that description more aptly than digital?

Here's a simple experiment. Ask your parents if they have a Polaroid camera or dig in the basement and find a non digital photograph from what may seem like ancient times to you. In other words a photograph not taken using a phone.  Next take that photograph and toss it away from you like you might if dealing cards.  Cards are another ancient item. They are used for gaming but I digress.  That non digital photograph magically flying through the air without the aid of  digital technology is by definition a MOVING PICTURE. Does that make throwing an old Polaroid you found in a box a movie?  I would say no but if it were a movie it might be titled My Naked Ex Girlfriend & Her Hot Friend. 

Also film images DO physically move through the projector but apparently we don't all know that.  For more information on how filmed images and something called persistence of vision works to make the MOVIES we all love, visit your local library or consult me. Of course you could just lazily ask Siri or some kids on Instagram if you prefer. Of course we all know all the real movie experts are on TikTok these days. Assuming it hasn't been made irrelevant during the time it took me to compose this flippant post.