I currently run windows 10 on my main desktop PC, and also have a steam deck that I sometimes use in desktop mode instead of my desktop. With the way Windows is going, and the way Linux Gaming is dramatically improving, I might consider ditching Windows, at least for the most part, on my next PC build. What would be the best distro to use for gaming, with casual use as well? Any suggestions?
Probably anyone that keeps updating a little to get mesa and nvidia updates frequently, even if you use testing or unstable should be great if you install steam from flatpak.
You only have to jump into arch or steamOS if you want to use literally the latest features of mesa driver (but you don't have to for 99.9999% of the games) so just pick the one that you like and if it is more stable distro, install steam via flatpak.
I use endevourOS cause I'm maniac with updates, I like to use latest stuff everywhere, but uou should not have any issue with Mint, PopOS. Debian stable could stay on older graphics driver for longer andcan be a problem, but you can just switch to testing or unstable branches.