The crudely-drawn faces that constitute rage face comic memes may seem vague and random, but they actually represent very specific emotions. This chart from the scholars at Know Your Meme explains the comparative relationships between them based upon depression-elation and bliss-rage axes. You can view a larger image at the link.
http://knowyourmeme.com/blog/white-papers/visual-analysis-dimensions-of-rage#.TeQEV1ueaSp via The Mary Sue