As the title implies, post the unmodified picture/video/gif/zoetrope you use as an avatar and tell us where it comes from.
Mine is the floating head of Niccolo Machiavelli's portrait.
[t]http://upload.wikimedia.org/wikipedia/commons/e/e2/Portrait_of_Niccol%C3%B2_Machiavelli_by_Santi_di_Tito.jpg[/t]
I make an effort to scratch-make all my avatars.
The one I have right now has the protagonists plus a few antagonists of the Ace Combat games.
It's from the banner of the Team Fortress 2 promo items from Dishonored
[IMG]http://cloud-4.steamusercontent.com/ugc/451782139981484945/F11ACEB990AC36736E4399EBEAC32DC0F4D5579A/[/IMG]
The visual novel Katawa Shoujo.
Specifically this picture.
[img]http://vignette4.wikia.nocookie.net/katawashoujo/images/0/07/Hisao_and_Rin_walking_in_the_rain.png/revision/latest?cb=20130721185125[/img]
Made it myself out of a warning symbol for explosives. With made, I mean badly photoshopped
It's from a 2010 "photoshop vaultboy" thread, I've been modifying it slightly over the years. Right now it's wearing Jay Kay's Space Cowboy era hat.
Now that I look at it I should probably flip it.
Hidamari Sketch x 365 opening as a reference.
I drew it in MSPaint and animated it in GIMP.
It was the old workshop thumbnail for a TF2 cosmetic for both Scout and Engie, but the image was removed and this is my last iteration of it besides my steam avatar.