I like to change up my digital environment sometimes. Do you?
For me it's a calming act... if I feel out of control I can simply switch things up on my computer and such and suddenly everything feels fresh and new to use. I've done something! I've changed something I interact with every day! It keeps me happy. Plus, variety is just nice.
This serves as a little record of how I've set up my desktop over time, I suppose... although it's fairly new so it's not much to look at... wait a year or so and then you will see, hehe.
I save all my wallpaper/colour/sound effects (always Windows 7) etc. for any layout via deskthemepack files. Feel free to ask me for one if you're really that into it, but at the same time I don't know why you would.