It is really different for everyone, much like the distribution in more “neurotypical” people. For me it is all about story, a good story will get me, but just describing how something looks doesn’t add to the story for me.

e.g. enough character detail for me would be something like, “just then, Jim walked in, extremely tall and whippet like, he had a sallow sickly complexion” much more than that, and it becomes redundant for me.

I was a member of r/aphantaisa for a long time, a lot of discussions there were started because someone was trying to blame their (perceived) shortcoming in some area on aphantasia. Without fail, some other aphant would come along and say…na that is how I make my living, it isn’t because of your neurodiversity. The classic one is visual art (I’m terrible at that), but a whole heap of artists are aphants. But reading came up fairly regularly also.