TrueF1Grit, congratulations to your brother for doing so well in his karting :)
My desktop wallpaper is a blue linear geometric pattern. It came with Windows and is called “Crystal”. It sounds boring, but it’s peaceful and doesn’t lead to me staring at the screen for 30 minutes before getting anything done (a motorsport-related desktop wallpaper would carry that risk in my case).
My PDA’s wallpaper is not so limited because the screen is so small. It’s got a version of Bruno Mantovani’s “Fisico na Ferrari” picture, but with a recoloured background and slightly different lighting effects so that it was usable with the PDA’s theme.
Tangentially, my desktop screensaver is a Force India one from Belgium 2009.