face looks too flat; hair needs more detail;
shirt looks strange, especially the collar; pants look like a muddy river. But I like the foreground hand...
ive tried it with other colors and i personally like them all,
its pretty easy, i just used a smart blur to flatten the textures then posterized the image and used select>color range to select and color each level of posterization. It kinda reminds me of the iPod commercials a little, idk lol