As a suggestion, a lot of those will not be accepted as avatar material by Mur. They need to consist of details and have a certain degree of realism. No... pictures of axes and what not, last I saw, axes could not speak, unless they were lodged in someones face and they were screaming a violent death... then they spoke saying "shut [spoiler]the fuck up[/spoiler] or I'll keeel you!"
They need to be of people in an action stance, or performing some kind of simple action.
Like a man, thrusting his spear towards the viewer, or or woman pouring a bucket of water...