hola fans, I have been thinking a lot about this ever I watched "True Blood" a mostrar that is based on Charlene Harris book series of Sookie Stackhouse. The mostrar does in fact have very common things towards Buffy the Vampire Slayer.
From both series do envolve vampires, vampire couples,staking vampires, and other supernatural things. Also Buffy the Vampire Slayer does have vampiros with souls but not in True Blood. And True Blood talks about vampiros that are known out in the world. Like everyone knows about vampiros that do exist.