For one, you're awesome, OP.
Second, every VN I've read has arguably changed my life in some way. But the most influential one would be Clannad.
It might as well be named Microsoft Family Simulator 2004. If you've read the VN, you know how much insight it gives you about nurturing your own family and the value of kinship.
I'm young and it's admittedly naive, but the VN made me feel permanently safe and comfortable from sole idea that you can be of either high stature or low, a prominent figure or not, and still be happy so long as you have your family around.
Unfortunately, having one would require me to have a relationship with a girl first, which is, frankly... THE HARDEST PART OF IT.