what defaults didn't work for you? i only removed the floating panels (screw those) and changed the shortcut for konsole. Done.
My guess is many KDE users have one or two adjustments they make, but we're all different.
I add a "keep window above others" button to the window title bar and set the "menu" key on my keyboard to be Compose.
That's the problem I have with most DE talks though
People act like these issues are going to "stop the Linux migration" or otherwise, and then they give examples of things that most users will never do/isn't even possible on windows / mac
It feels like most people don't like some DE's just simply because it's not what they're used to, not because there is actually a problem with them