I find it very nice to see the different icons used in technology such as the case of Angular JS. Today it ocurred to me I should stylize important directories with their official icons or my own. I went on to search for logos and cropping them in my favorite editor which is Fireworks. I used this icon generator online. Here is a tutorial on how to assign icons on windows and here for the apple desktop.
I think is also a great idea to quickly identify folders on your desktop by categories. It is a lot easier than reading every generic folder.