I'm super picky about what's on my desktop. For years on Windows, I just used a plain blue background, no icons.
Ten years ago on Linux, I found a visually interesting but not distracting bunch of random color swirls. 11 years later I'm still using this same background.
Ironically, I use a tiling window manager, which means windows fill the whole screen... I only see the background for a moment when I switch to an empty desktop.
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