I have tried out Gnome, KDE, Lxqt and Xfce on a regular desktop and all of them feel nice. I haven’t tried many DE’s on a laptop.
Are there any particular DE’s you like on a laptop, because of things like power consumption and efficiency that would not come normally into consideration for a desktop?
Yeah, KDE Plasma is surprisingly light on resources. I’m flexible and can make almost any desktop environment work for me, maybe because I started back in the day with TWM and FVWM on HPUX. However, given the choice I run Plasma with the Latte dock, I got it setup to look like a macOS/Unity mix on my Laptop.
I recently got it going with Wayland, even though I’m using a NVidia gfx card in Dedicated mode, and it’s just amazingly smooth and free of several X11 old annoyances. Gaming through Proton/XWayland works well too.