I’m going to be I a minority here since my opinion is from a visually impaired individual. I personally don’t like illustration, what is the use of illustration for people like me? I’m glad text games are available because its frankly the only game a blind person can really play without too much difficulty.
Now, if a game does have illustration be it an NPC, MC, Landscape, Buildings, etc. I’d rather it be partnered with a description, but the description needs to resonate what the image and word are trying to portray.
I still rather have a text game as text and let my imagination do its work.