You should definitely just use what you like. If you’re going with Debian, maybe go with stable instead of sid. Your games will work. Distros that are being labeled as “gaming” just have some things added for convenience, saving steps after installation. Hopping around is not necessarily a bad thing, either. I’ve used different ones over the years from different branches. It’s good to know how they work. I can pacman. I can apt. I can dnf. I even used to apt-get and yum.