Here are a couple of click visual styles to add to your collection.
The first is the Windows 8 Lemon Drop visual style. It has a Mac style minmalistic interface.
You can download this here.
And the second is the Whisper Windows 7 visual style with its clean, clear interface.
You can download this VS here.
Windows Vista Ultimate and Windows 7 users would be aware of DreamScenes included in the Extras update. This allows you to view videos and slideshows as your wallpaper. Now, this feature is available to all Vista non-Ultimate and Windows XP users as well. For lots more information and and HD videos for DreamScene check out Winmatrix.