I find faces a little problematic actually. Since facial recognition is such a huge part of our brain, it always seems like Primitive is ignoring the face too much and spending time on extraneous details. (I've previously experimented with weighting some areas of an image more than others in the algorithm because of this.)
I think the flower works well, but I might replace it yet again if I find an even better demo when I have more time to spend on it.
It's a minor matter, but it's a shame you felt the need to remove the image when it's so useful and relevant.