I really love VNs because you can create very separate stories inside of one single project which split apart depending on the character's choices.
I also think that VNs are easier to read, with visuals to keep you interested and music and sound effects- and also, I like how there's only a little bit of text on a screen at a time, or a little bit popping up on the screen at a time. When things are fed to you in small pieces, it's really addictive and hard to put down.
(Like how I was watching Cardcaptors... I just got all 70 episodes and 2 movies 3 days ago, but since each episode is just 20 minutes long... I've already watched till the end of episode 48...)
As well, you can make VNs with a little practice as a small team of people or even just on your own, which is great. While you're playing VNs, you really get the feeling that you're there, or watching a movie or an anime. VNs can create such atmosphere- and you don't have to have a huge team to draw literally thousands of frames for a few minutes of screen time, and you can make the VNs as long as you want and as complex as you want, which other things like movies wouldn't let you do.
The ability to unlock things, all the complexity that you can put in and all the extra stories and chapters that you can find yourself as a player really make VNs fun to play, and since you can only make one of the choices in the split per playthrough, you'll get to play through it again and again and again to get 100% of the game! I think the whole idea of it is brilliant
