I think that Armor should give us the option of uploading our own photo as our Armatar, like all the other games allow. We should have the option to use the photos already provided or upload our own photo.
This option is not allowed, simply because it would open the door for people to upload any form of profanity, spam, advertising or other hurtful images onto this website. 'Never say never' of course, but it is likely not going to happen in the forseeable future. =)
You can, however, enter your own creations in the ArmorGames' Armatar Contest and have your very own special edition Armatar to use. But so would all the other users if it is accepted and chosen...
