Yep I love VN's...
My avatar is from a VN actually XD
Anyway, I find VN's are a bit daunting for some people to full get into (Most VN's are weird, convoluted, has adult content or all of the above.) Some of these don't even have an English release.
Some of my all time favorites are:
The
Maji de watashi ni koi shinasai series: an Eroge about friendship, family, and never giving up. The routes may be a bit generic, but there's unquestionably a lot of heart on its characters and writing. (18+)
Fate/Stay Night: Convoluted, epic, violent If you've seen the anime only skimmed on the worlds lore, as the series is chock-full of it. The characters are also undeniably likable and timeless XD (18+)
Zero Escape: - Series: Brilliant story with an equally brilliant premise; a collection of people are kidnapped and forced to play games to ensure their survival. The game is part VN part Puzzle game - with your character forced to solve elaborate puzzles, or face death.
Danganronpa - Series: For all intense and purposes this is very similar to Zero Escape, just as well write and set on a creepy school.
Ace Attorney - Series: You play as an attorney and use evidence to protect your clients in the courtroom. Fun Characters, gripping plot, and clever story hooks.
Love plus: A straight up dating sim, but one that took everyone by storm. The three heroines are great and the post game content is even more so.
Amagami & Kimi Kiss: Another dating sim, really not that mind boggling but the each character story arcs are so enjoyable you won't really care. Each story is sweet and able to pluck at your heartstrings.