Dev, I'm going to give it to you straight, most people don't know how to criticise art. I don't know if the people saying the "style is bad" are trying to spare your feelings, or if they don't know what they're talking about but I'm going to tell you now - Your art is amateurish and inconsistent.
That doesn't mean you can't follow your dreams and make a porn VN, and it doesn't mean that people won't be able to fap to it. But the muddled criticism in this thread is not very good, and not worth paying attention to in my opinion. You should ignore people telling you how to make your product and just do what you want to do. Unless you suddenly become a better artist, people are going to try to tell you in a million ways that your art is bad and that you should do this, and you should do that, and you need to ignore them.
Just as an example, look at a game called Lovelust: Project Stockholm, that game has pretty bad art, but it's still quite good.
And I'm not trying to be negative, quite the opposite. Anyone who is willing to put themselves out there and create a piece of media, and open themselves up to any level of criticism, has a courage many people aren't capable of. I just think that unless youre going to spend 5 years refining your art skills, its better for you to just create and fuck the haters. Good luck OP, I hope you can make what you wanna make.