I think it would be awesome to be able to set/use Gallery image categories or albums to be shown in the Avatar screen as a gallery to choose from.

My other suggestion, though I believe I've mentioned it before, is to be able to set personal photos from the gallery as well, especially since you can set avatars from there.

With both of these suggestions it would be helpful to add permissions on which areas/sections they pull from or are allowed to set them from.