http://theoatmeal.com/comics/unhappy
This crossed my news feed recently and while not directed at depression specifically I think it helps illustrate some of the difficulty of anhedonia quite well.
The uplift is there at times but for the most part it’s just sort of that dull flat emotional state. It’s hard to illustrate that to most folks, most folks just figure “you’re happy or you’re sad”. The layers of gray to me are much more varied.