Not that I ever passed up the chance to peep on my mom's bare boobs, I never had any desire to fuck her. Now, accidentally walking in on my friend banging his mom over the back of a kitchen chair, I can't think anything hotter. That's how I look at incest games here. The kink is more in watching.
Yeah, I can get that. I also don't think there is anything wrong with consang people, any more than there is anything wrong with being gay, lesbian, trans, etc. Of course, in reality, they should use birth control, if they are closely enough related, too high of a chance of major birth defects.
The only type of content that I am 100% against is non-con. If a character had something happen to them, like in the game Avalon, in the past and it is treated as something serious, then I can get past that. I cannot go for it happening as I play and especially when it is treated as something trivial(I know real victims, nothing trivial about it) or that the victim starts getting into it(100% bullshit). If a character tries to blackmail for sex and the game let's you tell them to fuck off, I am OK with it, otherwise a big no for me. Even bestiality is fine, as long as it is consensual, IOW, no male fucking an animal and no female baiting an animal(peanut butter to get them to lick), just presenting themselves and if the animal wants to do it, letting them. Also, I think that roleplay of non-con between two adults is fine.
There ends my dissertation on the values of adult VNs/games.