I like drabbles too. For me, the issue is that my main canons have fantasy or historical or mythological settings, or sometimes sci-fi. Sometimes I just don't have time or I'm not inspired, but there are some months where it isn't possible for me to write anything because both pictures are unavoidably modern and set in the 20th/21st century. (Like I remember one month when both pictures were Coney Island signs. Or the pictures are of cars or motorcycles, or whatever. Not much I can do with that for The Lord of the Rings and the Silmarillion!) If other people enjoy writing for those, I have no problem with it, but I'm probably going to sit those ones out.

I know it would help me to have pictures that look less modern or are less specifically tied to a specific time and place -- like a nature scene, or musical instruments, or a stone wall, or jewelry, or something.

It might also help to have variety between the two pictures in subject and mood, because then if one doesn't work for me I might be able to use the other. For example, if people like the modern pictures, maybe there could be one of those and one that's more historical or fantastical. Or one picture could be more bright and one more melancholy, or one more about specific objects and one more abstract and poetic.

Those are just my ramblings, you can take them or leave them!