Rainbow-colored horse-like creatures… And you missed Rainbow Dash? Never mind. Brony thought, he he.
I like the creative idea of the fill pattern distortion, but I also think that you abused a little that effect… looks a bit like a mixed plastiline… But well, that's the idea of the icon set, no?
Well, I think it's a extravagancy, but it's very notorious, like for being used in a few favorite or important folders…
Good job. Very good job.