I was unsure if choosing a specific visual novel would make the discussion too limited, so I decided to go with the genre as a whole for this thread.
Still, I sneakily used my favorite visual novel as the image: Steins;Gate! It was my first game in the genre. I bought it on a whim for PS Vita, after seeing the glowing review headlines that applauded it for its great story and music. Little did I know that this meant only story and music: there was barely any gameplay! This together with the fact that some of the tropes felt really strange to me at the time (I was not really into anime culture) made me regret my purchase and almost stop playing.
But somehow the story got its hooks in me. Only a tiny bit at first, but day after day I became more engrossed and looking forward to my play session. I read it mostly during the night while in bed, and it really took over my life for some time. Eventually I finished all routes and achieved the true ending, which is one of my favorite endings and stories in videogames as a whole.
Since then I've played lots of others. Some quick thoughts:
-999: a bit disappointing, the story felt very contrived and not as great as others experienced it.
-Virtue's last reward: a real step up from the previous game, complex and satisfying story with a very meta twist to it!
-Zero Time Dilemma: often described as the worst in the series, but somehow this story really grabbed me from start to finish. The stakes were extremely high and while the story was very convoluted, the payoff worked for me.
-Danganronpa 1 and 2: very strange and over the top, but extremely well written mysteries with great presentation and soundtrack
-Ace Attorney: the first game in the series. I played it on switch and liked it, but didn't love it. The humor felt to childlike for me at times.
-Planetarian: fantastic little gem of a game. Most visual novels will demand dozens of hours of your time, but this can be finished in less than 5 hours. Absolutely amazing.
-Muv-Luv Extra: I am currently finishing all routes for the first game in this trilogy, as I have heard multiple times that the 3rd one is incredible. I liked it most when it was just funny nonsense (it can be quite hilarious at times). The serious parts really didn't hit home for me and a lot of the content feels a bit problematic and strange. I suppose some of this is culture, some of it satire and it was originally an erotic game so that might have something to do with it.