We're just different than most; there's obviously going to be both similarities and discrepancies between varying dimensions. The vampires that are in movies and books aren't the same as reality, save for the obvious blood drinking, although there are also blood tablets one can take. [want a list? sure] We don't burst into flames when exposed to the sun, although it can fatigue us. Religious based items do nothing. We're alive; breathing, warm skin, a pulse, etc. There are different levels that a vampire falls under, which can dictate how strong they are, as well as if they have any particular ability.