I have this (or something like it). You basically can retreat into a fantasy world that plays out like a movie with yourself as the main character. You can run through any number of imagined Walter Mitty scenarios and feel at least some echo of the emotions - enough to make it quite addictive. It's your standard power fantasy stuff really - imagine the gamut of those Reddit anecdotes that end with "and everyone burst into applause" the whole way up into being world king (why not, it's your daydream!)

So playing out scenarios in your head, essentially. Might sound harmless - there is no question of confusing these daydreams with reality - but you can find yourself retreating into the same ones again and again in a loop, especially when triggered by alcohol or music. I could put on my favourite songs and fantasize literally for hours, replaying the emotions. Endlessly scratching an endless itch. Obviously this might not be conducive with a productive life! I guess it would serve one well in solitary confinement.

I used to think everyone was like this, but it seems quite rare. I don't seem to have a bad case of it, I certainly wouldn't dream of trying to medicate it. But it does make me feel bad about myself sometimes when I overdo it.

Here's an article on it that may clarify more: https://www.theguardian.com/science/2022/aug/28/i-just-go-in...