(Most) everyone likes plants and animals, but may not want to watch them repeatedly dance across their screen. Luckily, the Apple TV provides you with a number of ways to access other photo content for your screensaver.
To change things up, roll over to the Apple TV’s Settings menu, then down to Screen Saver. On this screen you can decide how long you want the little black box to wait before taking over, choose whether you want the ‘saver to show up during music playback, choose what style of screen saver you want—there’s plenty to choose from, or you can even have it pick one at random—and choose what photos you want to appear.
In the case of the latter option, there’s again a lot of options to choose from.
You can select from one of the built-in image libraries—but where’s the fun in that?—or have it load up photos from a MobileMe account, Flickr, or from your iCloud Photo Stream. If you have Home Sharing setup, you can even access photos from an iPhoto or Aperture library, or directly from a folder, if that’s your cup of tea.