I’ve been using linux for some time now, i would still say i’m quite a noob but i’ve tried different desktop environments, for my experience i found GNOME to always be suited for me, anyway i heard many good opinions on KDE and i would love to try that too, i’ve tried cinnamon before and couldn’t really see myself using it, i’ve seen Kubuntu and looks quite lovely, what’s in your opinion the distro that best implements KDE on Debian or preferably Ubuntu?
And if you want rolling release, Testing is a pretty decent experience, just be mindful that security updates come a little slower.