Michela@k KDE is awesome these days! I have been running it since 3.x, though I swtiched away during 4.0 - 4.3.
KDE is very stable, refined, resource efficient, and beautiful. Of course, one can also still customise it any which way.
In my experience, Fedora KDE spin is the best KDE distribution, with OpenSuSE a fairly close second. Fedora is the most polished and stable KDE distribution that I have used (basically zero issues ever).
I run KDE on my main work and home laptops.
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