I've long maintained that music listening is my utmost addiction. Which, in the grand scheme of things, isn't a bad addiction to have. The downside to this is that a song will remain playing in my head long after my headphones or speakers silence, and I'll even catch myself humming or whistling stuff at random intervals.

Similar to you, I daydream as well with my headphones on. From a very young age, I would imagine a certain movie or narrative with the music I was listening to, or imagine that a certain song would be perfect to describe a character, scene or film. Therefore, I used to come up with "soundtracks" of music I felt would encapsulate shows, movies or characters that interested me. That, or I would imagine what would happen if a show, movie or game used a favorite song of mine to emphasize key plot points.

I find myself doing that to this day, it seems. In fact, the music I listen to is one of my greatest creative inspirations, whether through writing or media production.

In my honest opinion there is nothing wrong with having an active imagination in your 20's. Society often associates imaginations with children, but being imaginative often lets us express our creativity in great ways.