Linux

If you're new, IMHO you should be looking at the distro as a whole, not the DE specifically. Yeah, if you find one you mostly like but want to try other similar distros, it's probably a good thing to stay with the same DE. However, it's not something to get hung up on as distros often tweak the DE.

And to answer your question, Cinnamon. After years of distro-hopping, I've spent most of the past decade on Linux Mint.

Both KDE and GNOME are good DEs (and there are many other great ones, and you don't even need to use a DE; a mismash of applications with your compositor of choice works just aswell - but I digress), you can't really go wrong with either.

For someone new to Linux, I would likely recommend GNOME, because it is more opinionated. While KDE is a lot more configurable, that also has a huge downside: configuration fatigue. GNOME is more restrictive, yes, but that has the advantage of not overwhelming you right out of the box.

If you like and wish to tinker, though, go with KDE. If you want to gently ease into Linux, go with GNOME first, and once you're comfortable, you can still experiment with KDE. You can install both, and switch between them simply by logging out of one and into the other.

I used Gnome on my desktop and it was great! But after a while I just wanted to try something else, so I switched to KDE on my desktop and laptop which is also great. I technically have both installed but I mainly just use KDE plasma. I also recently switched to Wayland. For me at least both are equally good buy in different ways.

Check Bodhi Linux's Moksha Desktop. Pretty lightweight and does work

Started on Gnome 2 for a short stint then used Unity for a while (used to be Ubuntus DM). When I switched away from Ubuntu I was still looking for something "familiar" so switching to Gnome (it was like 3.8 at the time) felt right. Have been using Gnome ever since.

I've thought about switching to KDE a few times (when Gnome made some bone headed decision) but the way key combos and workflows are ingrained to me I would just set up any DE to feel like Gnome so why should I switch.

XFCE + xmonad

I use KDE for desktops/workstations and Gnome where I want more of a 10ft interface...like HTPC, or if I have a touchscreen device.

I use lxqt mostly beacause it's simple and moderately lightweight.

You are used to KDE and Gnome is very different But also KDE is buggy, I dont know how Steamdeck people make it better. If you chose Xfce, you will get a KDE similar desktop but more robust. Xfce can look modern with few efforts. MX Linux distro is a good example of a nice Xfce config.

Doesn't really matter for 90% of cases, best bet is to go for what feels good for you. Each distro is similar to each version of windows, they are a little different from one version to the next, but for the most part it just changes how you interact with it.

neither. i think i have cinnamon now on everything except the old junk that has peppermint (its xfce there) or is a console-only box or vm.

Any tips for 4k gaming on Plasma?

If i force system scaling, everthing looks great but games dont get to use the full 4k. If i go with app scaling the games look fine but some apps are blurry.

I figured out a halfway solution where i use no scaling and just made the fonts bigger, but some ui elements are still tiny, and steam doesn't scale at all.

Is there a way to disable system scaling for just selected applications?

I use both: GNOME works better for a desktop, KDE Plasma works better for a laptop.

There are more than those 2 options for a Desktop Environment, by the way ;)