I rarely look at preview pictures. To me that's like looking at pictures of a new movie I want to watch. Why spoil the game for myself? Instead I read the tags and the planned content tags and decide from there. I avoid sandbox/free roam games, rape/mind control/sleep sex games, most paranormal/supernatural/fantasy games, almost all incest games, and loli games. I am sure there are a few other tags I look for and avoid games with them...
The tags are there for us to know what is in the game or planned for the game. It saves a bunch of trouble to read them and then know whether the game is right for your tastes.