I have come across some sites here that are requesting that you inform them before you download the wallpaper on their sites. That's ok. Do we need to ask others before we download....say for favorites, or our own use, please?

No, feel free to download our wallpapers and use them on your computer. That's why there here!

If you really like the image, also don't hesitate to leave a comment on the wallpaper thanking the uploader for their submission.