I echo a lot of the sentiments expressed by others about avoiding games from bad publishers or games employing milking practices, avoiding multiplayer and toxic people, overly hard games, and many other points already stated.
My two things that are different are that I enjoy hard games so long as the reset is instant or near instant. Like Katana Zero and Hotl8ne Miami. Without that I don't want any part of a hard game. I get it, I died, let me try again already. So fuck games with long reset times.
And more unusual is I really don't like most isometric games but especially clicky isometrics. If I can't wander freely with WASD, fuck it, I'm out. Not going to sit here going clickclickclickclickclickclick just to go half a screen and open a chest. Fucking hate overly clicky shit like that with a passion. I also dont like how up is more like diagonal up and left is diagonal up etc. It's just annoying. My only exceptional has been project zomboid.