flyingappels

You are right about what makes telltale games sucessful, but simply saying that you can make a vn for every different type of person isn't going to cut it. Targeting a niche of a niche market won't really pay of, and you still would have to reach your audience. And you haven't answered who should produce those vns. These three things (How big is your market? How would get that market to buy&try vns? Who has a reason to and will produce them?) are much more important than plot ideas

Here is a plot idea that hasn`t been mentioned until now, that could resonate well enough with a western audience: Classic european mythology. Many outside of the Otaku subculture can`t relate to Kitsune, Youkai and the like, but the labors of Hercules, the Odyssee or the story of Beowulf would probaly make a good basis should one want to undertake such an project

So, from what I understand you want visual novels to have more western/less japanese themes and artstyles in order to make the medium visual novel more popular in the west. That by itself is great, as there is surely lots of potential there. However, you fail to understand one important part: There are (almost) no western visual novels because (almost) no one is making them. You stated many ideas you think could make visual novels more appealing for a western audience, but all you did was state them, but that will do nothing, even if (and that is a big if) these ideas where good enough to suddenly make the whole forum crave a western visual novel. Somebody still has to make it, and you don`t sound like you are planning to be the one to do it. The big visual novel market is in Japan, and they simply have no reason to make games for a western audience. Not that they would really be able to, as they simply lack the needed cultural insight. So all that remains are small western companies and dedicated fans. The former have no reason to make them because they would have to risk their future on a project of that scale, something no one is going to do when they don't even know how big the market is and what it really wants, and fans are unlikely to do it because most fans of visual novvels enjoy japanese novels the most, so they would much rather make something that resembles them. That said, if you want to produce a western visual novel go right on, it`s not like you got something to lose.