If you're going to be gaming a lot, I can vouch that Nobara is indeed really good. Debian is a solid option but it like the other commenter says, it gets packages a bit later than other distros. This can be annoying since you'll have to go out of your way to install the newest drivers or app that you need.
The bigger reason to use Nobara though is that it comes pre-installed with many patches (some kernel patches too) that would be a total pain to do yourself on Debian. You can see a list of patches on the official site and scroll down.