When I set out to completely scrap my default Cinnamon-on-Linux-Mint experience, I decided I wanted something that felt like a fictional OS from a video game, like you'd sit down at someone's computer and see some BS operating system that you'd kind of understand but it definitely doesn't resemble much of what's real.
So:
Linux Mint 21.3, running Cinnamon. The dock on the left is Plank Reloaded, and the top panel is just a Cinnamon panel, with left-formatted date cause I haven't seen a major OS put stuff like that up in the corner. Both dock and panel intelligently autohide and are a dream to use. The little turtle emoji pops a somewhat custom applications menu, accessible with the Super key, both on dock and panel.
The system font across all elements is Inter, the most beautiful display font I've ever seen: https://fonts.google.com/specimen/Inter, and it just brings a certain elegance that the stock Ubuntu font is sorely lacking.
The theme is Semabe Grey Glassy, with the transparency tuned quite a bit for my personal taste, the mouse is Future-Cyan-Cursors, the dock icons are Mint-Y-Dark-Pink but with a modification for the turtle emoji, and the Linux Mint boot logo has been swapped out for you-know-exactly-what. The wallpaper is a moderately edited asset rip from Life is Strange: Double Exposure, and that blep turtle I fell in love with was as a mural on a wall in a bar, and since there's no clean photo mode, I could prolly just go find it (and I did!).
I hope you enjoyed looking at and hearing about my semi-fictitious TurtleOS!

Bravo! Nice desktop!
This actually gave me some inspiration I've been looking for to customize my LM. Thanks :)