I sure did! I came from Gnome 2 and the first thing I did once I started to use KDE5 was emulating the two horizontal panels design!

That counts, right?

I switched from GNOME 3 a long time ago, and emulating GNOME's workflow would be the last thing I would want

Top bar, titlebar buttons on the left, "dock" on the right (which is just a panel), hotcorner, ...

I don't really try to replicate GNOME but rather take what improves my flow from Windows, GNOME, Unity, MacOS, ...

But that's the wonderful thing about KDE : you can choose to customize whatever you like however you feel !

Sure did. Kinda?

Moved the panel to the top, added a dock (rip latte, it's now just a panel) and set a hot corner for the overview effect. I like it to move windows between desktops.

Everything else is default though. Maybe I changed the application launcher widget, I don't remember.

Personally, not. The reason I switched to Plasma is that I didn't like the basic layout – horizontal bar especially – and wanted a desktop environment that allowed me to customize positions and sizes of bars and so on as much as possible.

Still baffles me why they steal the screen's usually scarce vertical real estate with a horizontal bar, instead of putting it on the side...

I've gone through Gnome 2, Unity, Cinnamon and nowadays tend to favor KDE and honestly, I pretty much always try to replicate a traditional experience no matter which of them I'm using, so pretty much the opposite of what you're asking, I suppose. I'll say I did appreciate the top left corner quickly exposing all windows, so that feature I try and replicate whenever possible.