I believe there're other shoujo mangas which deserve to be more famous than this crap. Back to the time when I didn't read that much manga, I thought VK was kinda good but now, I regret deeply for thinking like that.
There's nothing original about this manga but this isn't my main complaint here. After all, manga is full of cliche, it depends on the mankaga to make their manga more tolerable or special than the others. Unfortunately, VK doesn't fall into this category. Mediocre plot (not to mention super cheesy) with mediocre characters, even the art isn't that all unique.
I have lots of beefs with the 3 main characters but I shall start my rant with Kaname, my least favorite character of this series. I honestly can't see anything charming about him. He's just as creepy as that uncle (already forgot his name) who is obsessed with Juuri. Maybe if Yuuki had another male sibling who also fell in love with her, he'd kill him like that uncle did with Haruka. I found him arrogant, shallow and uninteresting. Girls may see his devotion to Yuuki is totally romantic but it's just like a god-damned obsession given how his love is portrayed. By no mean that's a healthy relationship.
Next, Yuuki. A flat character. I honestly have nothing to say about her since her character has no depth at all. Nothing for me to even bitch about it. Even for a main character in shoujo (which is usually your average girl), she is unbelievably plain.
Zero used to be a favorite of mine BUT he has changed dramatically after the incident at the academy. It's not that I didn't know he's in love with Yuuki before, I got that from day one but after that incident, the mangaka has made him become all lovesick which isn't funny at all.
I have to say that supporting characters are much more intriguing and lovable than the main characters. After all, the main characters in every manga, be it shounen or shoujo, often follow the same formula (with very few exceptions) so imo, they're the most boring of the entire cast. Supporting characters are what gives depth to a manga.
I wouldn't recommend this to anyone except shoujo fans. I gave this a 3, only for some characters I like.