Now first off, there are many different theories about what vampires are. These are just the main theories in general I could list all of them though there are too numerable to tell them all and are mostly connected to each other anyway forgive me for I'm just making up the names of them..
Monster theory: this is the belief that vampires are nothing but mindless monsters that want your blood and are like ghouls
EX: the vamps from blade. the creatures from i am legend are like them. Dracula is part of this in a sort of way...
Specialization Vamps: the theory that there are many type of vamps that do different things such as succubus/incubuses, elemental vamps (feed on the elements like electricity) and the infamous spirit vamp that drains you aura ( which I've found out you actually
can control you aura if you try...] link -->
click herenote there is a nude pic here bewarecivilized: the theory that vamps are just like you and me only they have super abilities and need blood to survive. in some versions they need norm food as well as blood
Ex]: twilite, circ du freak (probably spelled that wrong) Dracula is also part of this
and of course the one no one knows about but the most fascinating one (idk wat to call it so i make something up)
scientific:
click here for explanation if you don't understand what it is talking about simply put its saying that if you really believe you are a vamp then you'll turn into one subconsciously (it is also a good explanation for every other creatures like werewolves leprechauns possessed people) really its allot more complex than my simple explanation so if you didn't click link and just read this part your really not gong to understand this one
that's 4 of the simple, broad types of vamps
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might i also note that this isn't my beliefs on them nor is it fact or ficiton and is a simple summary of how people view vamps)