Vampire knight was made from the manga vampire knight in 2008 i am quite new to the series so bear with me. if you liked anime's such as fruits baskets you'll love vampire knight and if you really loved vampire academy and the other books in its series you'll love vampire knight, but if you liked twilight i suggest you watch it, it will turn you off that stupid phenomena and you'll love vampire knight real good decent vampire material unlike twilight which is suky, zero will make you loose your obsession with edward cullen trust me it's one of the best anime's ever made
i hope theres a third season xD