Hmmm. My first VN that I read would be Katawa Shoujo, back in early 2013. I remember I was sailing the pirate seas that time, and saw "Katawa Shoujo."
I was like, "Wut, Japanese titled game with English trans? Meh, guess I'll try it."
Finished the game in a day or two, only stopping for lunch and dinner. Sadly, even though it was my first VN, it didn't strike me as much as my next VN, which was Yume Miru Kusuri.
Damn, now that VN left a really deep impression on me.