It's been a while since I followed any memes, but this one is interesting...
Look at your LJ userpics list. If you have fewer than 50 icons, pick every fifth one. If you have between fifty and seventy-five icons, pick every seventh one. If you have over seventy-five icons, pick every tenth one. If you have fewer than ten, pick all of 'em.
List them on your LJ, and tell everyone exactly why you have it, why it's interesting to you, what significance does it have.
So here is every seventh image from my 57...

Piro at work. From the Megatokyo webcomic, and used when I'm talking about writing. My desk looks a little like this one (but is usually messier, and has more screens).

"It's our ride". The Serenity from Joss Whedon's "Firefly". I made this from a screen cap I took from a Firefly DVD, while experimenting with screen capture software and a new graphics software package.

Lavie and Klaus. An illustration by anime character designer Range Murata, from my favourite anime, the excellent "Last Exile". Steam punk with politics, and rather nifty flying machines. An default icon of old. I have the same picture on a mouse mat...

Cat and Girl. One of my favourite webcomics, everyone I introduce it to seems to run away from its excoriations of hipster culture, and its regular excursions into literary and artistic philosophy. Ah well, I say. Go buy the t-shirts.

The happy iPod. I use this one for music-related posts. Hand edited pixel-by-pixel from a Joy of Tech. Yes, it's another web comic...

A Range Murata character study of Lavie, again from "Last Exile". This used to be my default icon...

Hello Root Kitty. I don't like DRM, though I do understand why some people argue for its use. As a content creator I'm occasionally ambivalent - I want my writing to be free for anyone to read, however they want. But I also want to be paid, and I don't want my work used in ways I don't approve of...

A photo I took of an error message on our Scooba.I use this one for robot related entries. They're such dear little things as they scurry round the house cleaning up after us. Of course some day they'll rebel...