Preferred art style would be "1" for me.
I wouldn't be into a romance only VN, if that's what you're asking. I could see myself getting into "2. Crime/Supernatural/Romance", especially if the crime and supernatural elements go well together. What I mean is, the crime shouldn't be entirely explained by the supernatural. This can be done without making the supernatural elements redundant but it's difficult to do right imo.
If this VN is something you're going to pursue, regardless of what direction you decide to take it, I wish you good luck and urge you to update us on your progress along the way