For me, the main problem is the cliched plot of most games. Even considering that we are talking about porn games, we need a story that can capture and hold the player's attention, characters that have a certain background and character that can be developed, and finally, relationships should not just be about sex, but should be more realistic, because any relationship has its ups and downs. In one game, which I love very much, for 5 hours of gameplay there were only two sex scenes, but nevertheless I could not get away from this game, because I saw the characters as living people, with their strengths and weaknesses.
But alas, more often than not, the characters are absolutely two-dimensional, devoid of content and personality.