Dope walls mate !
It would be nice if you put the source of where you got the wallpapers in the source section (preferably the specific page and not the artist's general front page). It helps others quickly located the source and gives credit to the artist. Other than that nice wallpapers.
Edit: All of which can be done during the uploading stage. You don't need to upload them and then do it later. This helps prevent you from possibly forgetting later.