Would suggest https://aphantasia.com/ and their twitter as well. As Someone with aphantasia I was still amazed as how different the level of aphantasia can vary between people.
Maybe the quiz should first ask me to imagine that person in a specific circumstance, where those details are predetermined by my memory of that circumstance? Even then I still don't understand what the quiz really means by half these answers. What does it mean for an image to be "lively"? That it's moving around? Am I meant to be imagining a still image or a moving image? Depending on how I interpret these questions and answers, I could get completely different outcomes from this quiz.