I switched, after years of running Mint, to OpenSUSE Tumbleweed as a daily driver. It's very good and I'd recommend trying it. I like the way it's kept so up to date but very seldom has problems, and if an update introduces an issue it's easy to roll back.

You should be aware that the standard way to update Tumbleweed is "sudo zypper dup" and not whatever the GUI offers. Also you will need to enable one extra repository to get additional codecs.

Also note that you may occasionally need "sudo zypper dup --allow-vendor-change" to resolve dependency issues when package A depends on a version of package B that is only available in a different repository from the one from which you have previously installed B.

The only other thing I've found is that the Discover app will show you some packages as being available only in Flatpak form, and those don't get updated through the usual zypper process (I think). So you need to do "flatpak update" to get those updates.

Flatpaks can be a challenge to get working with each other (since they don't have access to all system resources) so it can be helpful to install flatseal to tweak them. But also some packages that Discover will offer as Flatpak only are actually available in RPM format if you search around (and sometimes enable a third party repository), and RPMs can be easier to get working with other software (though Flatpak's sandboxing is a good thing). The site software.opensuse.org is one place you can consult.

You can also install Snaps when you can't find an appropriate RPM or Flatpak.

Steam runs without problems on my machine and I can play many games.

Look up the process for rolling back to a btrfs snapshot using snapper, because it is reassuring to have this as an emergency recovery measure.

I'm not using NVIDIA but from what I've read most people don't find it to be a problem.