I like to personalize the Sitecore Desktop with my photos. Any images placed in /sitecore/shell/Themes/Backgrounds can be chosen by right clicking on the desktop and chosing properties. Attached is a Sitecore package of images to get started.
Install the SitecoreBackgrounds package or place image files in /sitecore/shell/Themes/Backgrounds
Maybe one of these
Just something fun, but adds a nice personal touch to your Sitecore instances. It helps me keep track of the many instances I have with a visual cue, too!