Imgur: The Biggest Little Site in the World
Imgur specializes in images that are not just ornamental, and not just documentary, but conversational. This is one of the crucial ways that Imgur differs from, say, Facebook, which remains the single largest photo-sharing service in the world. Imgur's images are, by and large, public, not personal. They skew more to the artistic than to the archival. If they were characters in Alice's Wonderland, their message wouldn't be "Look at Me." It would be "Talk About Me."
I like that notion: Images are conversations.
Still, Imgur itself is not a very good tool for having conversations.
Imgur is a tool for saving images and rattling off one-liners.