Content type

Hey @PAPA DELTA 

In my humble opinion, Art is a massive umbrella. Within your prompt you can specify what you are looking for in your image. As you mentioned the list is incredibly long. Besided that you can use the effects buttons below to give you a specific look or style. This is a short summary and very humble thought.

How to Generate Images Link:
https://helpx.adobe.com/firefly/generate-images-with-text-to-image/customize-generated-images/set-content-type.html#:~:text=Content%20type%3A%20Photo&text=On%20the%20Adobe%20Firefly%20website,section%2C%20select%20Photo%20or%20Art.

Using Effects by Jesus Ramirez
https://www.adobe.com/ie/learn/firefly/web/generate-gorgeous-images?locale=en-IE&learnIn=1

You may also want to join us on Adobe Firefly Discord Mon to Thurs. Jack and Shawn go over how to use Firefly in Adobe's different apps. We are encouraged to ask questions, provide feedback, and simply hang out.

Cheers,
O. Nate

I can only guess the answer since I was not in the Adobe decision-making loop (as are most people that contribute to this forum). It may be that Adobe felt these would be suffient, particularly in their early releases of Firefly.

You could always suggest other Content types for Adobe to consider. I have seen other image GenAI tools that have more options so would hope Adobe Firefly functionality will expand.

Adding the content type in the prompt is important for now.