Honestly? The quality of the models. If its a 3D game and your models give me uncanny valley feelings Ill avoid it. And on the flip side, if they look so bad they dont even look human Ill avoid them.
If it has both "milf" and "incest." No motherfucker content for me. Also, any engine other than Renpy. Anything dick related when it's male protag - futa, gay, trap, etc. Futa protag too.
When the MC is just some ugly guy you have to stare at all the time.
That’s actually made me quit a game before.
Such beautiful women, paired with such a jerk. It’s unbearable.
Apart from Japanese graphics, which I just hate (including HS/HS2), tags are the first frontier, since a number of fetishes are unacceptable to me (sissification, vore, watersport, scat, futa/trans, trap, gay, furry, etc.). In addition, before downloading the game, if it having been under development for a long time, I carefully read reviews, not those that consist of 3-5 sentences, but large, full-fledged texts with a detailed analysis of the advantages and disadvantages of this project. And of course, the summary-there are topics that I personally am not interested in, why would I waste time on such things?