Awesome! Did you use random darktoned fillers, or did you actually consider each character? I see your antialiased characters, but i hope you didnt actually make your life living hell by going through each filler character. nice job!
Despite the fact that I disagree with awarding this piece a DD, for what it's worth, I put the original image into three different Image > ASCII converters, and none of them were ever close to producing results such as this, so it's quite possible that at least some of this is original work. :3