I play lots of games on a AMD GPU (RX 7600) for about a year and I can't remember a game that had graphical issues (eg driver bugs).

Probably something hasn't run at some point but I can't remember what, more likely to be a Proton "issue". Your main problem will be some configuration of anti-cheat for some games.

My experience has been basically fantastic and no stress. Just check that games aren't installing some Linux build which are inevitably extremely out of date and probably wont run. Ex: human fall flat (very old, wont run), deus ex mankind divided (can't recall why but I elected to install the proton version, I think performance was poor or mouse control was funky).

I guess I don't play super-new games so YMMV there. Quick stuff I can recall, NMS, Dark Souls 1&2&3, Sekiro, Deep Rock Galactic, Halo MCC, Snow runner & Expeditions, Eurotruck, RDR1 (afaik 2 runs fine, just not got it yet), hard space ship breaker, vrising, Tombraider remaster (the first one and the new one), pacific drive, factorio, blue prince, ball x pit, dishonored uhhh - basically any kind of "small game" you could think of: exapunks, balatro, slay the spire, gwent rougemage, whatever. I know there were a bunch more I have forgotten that I played this year.

I actually can't think of a game that didn't work... Oh this is on Arch Linux, I imagine Debian etc would have issues with older Mesa, etc.