The Depicts guidelines at Commons explain that you should not add depicts statements about the format or genre of the image as this belongs in other structured data tags (such as fabrication method, genre, material used, etc.). Thus we should filter out the following tags that are commonly suggested by Google:
- portrait
- drawing
- macro photography
- illustration
- visual arts
- art of painting
- art
- modern art
- stock photography (debatable, but this is a very subjective quality assessment that also has racial bias)
- text (debatable)
There are probably more, but those seem to be the most common.