This is all great feedback! There's a few points I'd like to echo as well.
Please please PLEASE take breaks if you need to. Burnout can happen fast, it can sneak up on you, and leave you a husk of a person if you try and power through it every time. The majority of us understand, just let us know and we're alright.
Reducing the amount of bad ends or just bad feelings in games in general. I'm trying to play these to relax and get away from the harshness of life, if I'm feeling that too much in a VN, then I become very quickly disinterested. I don't mind working for the good ending, or to not have every ending go my way, but not all or most of them need to be completely horrible and leave a bad feeling in my mouth.
Diversity is very important, especially in species. I'm more likely to give a game a try if I see a diverse cast rather than your typical cat/canine/dragon.
Lastly, despite everything I said here, keep to your own vision. I'm just some ass on the internet spewing my own opinions. If you set out with a vision in mind for a game, keep to it, you'll thank yourself. Not everything has to cater to everyone, and many times will not, but its your project and your vision, in the end, the one who should be most happy and proud of it is you. And take breaks as needed.