I still maintain someone else used my computer to listen to Bel Biv DevoeEver since seeing Lee Byron's What I've been listening to visualization, I've wanted to map my own listening history. To reminisce over the last five decades of Last.fm scrobbles, and identify the peaks of post-breakup wallowing, thin stretches when traveling, and variation after merging libraries with friends. The forgivable periods of pretty-boy singer-songwriters, angry fem pop, and well, that whole time with Maroon 5.
And then Andrew Godwin went and built a simple app based on Lee's designs. LastGraph renders high-res posters with a few graphical params you can tweak for any last.fm username.
A snippet of mine: