I tried to do this but its really hard to judge all porn games equally since a lot of games are trying to achieve something different. Kind of like comparing apples to oranges.
Honestly? I think its luck, ive seen games with bad stories get popular because the sex scenes were top notch and vice versa. Ive also seen games that do almost everything perfectly and yet they still arent as popular as the heavy hitters.
Doesnt matter to me, it all depends on how the dev does it, grind with fun mini games can add to the experience but it can also hinder it. In my opinion devs should focus on story and sex scenes first and mini games later.
Gilfs can actually be hot depending on the models, I think when most people think of Gilfs the probably just think of old wrinkly older woman but on of the games i played like twisted world it had a pretty hot Gilf who actually has a good figure.
Its most of the time a horrible idea since usually games that have paywall in them dont have enough content in the free version to get a good idea if paying for the full is worth it
I agree thats one of the reasons why I usually wait instead of playing the first version of these games because a lot of the times I'm here for the sex scenes. So to me it doesnt really matter as long as the writing and quality is there.