You could take one if it was curated from appropriate CC or public domain images, couldn't you? Or is there a further technical limitation such that you'd want it to really, actually be made by the individual?

Also, with inheritance, one can do it in as little as 15 moods, though that's not terribly satisfactory … maybe if there were a list of the ones that were most crucial to have? Like, most of the angry ones are fine with the same, but stressed would be better with something different probably…