Being able to specify what I like about each particular photo at the input stage (and want to see more of in the output). E.g. I might like the perfect haircut from photo A, the nicest smile from photo B, the best eyebrows from photo C). This could be either with a free-text field next to each image (serving as a prompt to the AI), or some kind of selector paint brush tool where I can highlight the bits I like on certain photos