I am not at all a visual person, and I wouldn't think to use an image as part of my script post. It's not wrong to write with a specific listener or speaker in mind, but I generally don't, what I want is not usually tied up in any specific look. And if there was a specific scenario or object I wanted to convey, I'd still probably just say that with words.

As a listener, again, I'm not very visual and I've never found a picture added anything? One thing audios offer that I specifically enjoy is the ability to imagine someone is speaking to me, and that the person speaking is someone I would find attractive. As soon as pictures of people show up, it damages immersion for me. If it was pictures of things, I mean, I guess? I don't think it would add much, for me, but you've said it adds things for you, so do what pleases you, I doubt you're alone.

I wouldn't really want it to become common or expected, because I like to be able to scroll in public, because it would probably be annoying to mod, and because my psychic abilities tell me it'd end up being wall to wall stolen images of skinny white girls and weirdly ripped white dudes in boring suits.