People have different standards when it comes to arguing what is and isn't a vampire...
"For one thing, rewriting the rules is just good storytelling. Upending conventions lets you surprise the audience. You thought garlic was going to ward off the boss vampire? Sorry. You planned to kill him with that little piece of sharpened wood? Good luck. These days, you'll see vampires slapping crosses out of the way more often than shrinking in fear. Variations on the vampire rules also make for some clever plot twists."
Announcer: In fact, for the town boasting the allegiance of the King of the Night, I've hardly seen any vampires on the charts! Of course, it is daylight. They'd probably all turn to ash! Louie: This guy is clueless! We don't burn up, we just get really really bad sunburns, really easily! Edmund: Eh, No... Sometimes you catch fire.
It was upon the field of battle at Clamorga that the mighty Captain Moriar fell, defending the ridge against the despicable Eldar. Many were his wounds and the Sanguinary Priests were at a loss to heal him. And so it was that Moriar was interned within the sarcophagus of the Furioso Dreadnought built by Brother Morleo, as were Belaphon, Dario and Amaretto before him. Upon gaining his strength, Moriar was struck by visions of Sanguinius, his own near-death state triggering the Black Rage. Immortal now in his adamantium shell, Moriar survived the Black Rage, hungering for battle and death. The Red Thirst grips him, and the revered Brothers of the Armourium have modified his armoured suit so that he may partake of the vital liquid and be restrained when not in battle.
Kristen Stewart:You really are a vampire! Does that mean that garlic, stakes, and sunlight kill you?
Robert Pattinson:Don't be stupid. All of that lore is far too interesting for this movie. Being a vampire just means I get superpowers. It's like being Spiderman, but sexier. Also, I sparkle in the sunlight.
When the thirst comes upon me so fiercely that I can't recall my own name, when the searing Eye of the Day scalds my flesh, or as loneliness shrouds the vacuum where my soul used to reside, I wonder if I am as invincible as I pretend.
—Blaesing, Dim Triad member, from the Dungeons & Dragons supplement Librs Mortis
Contrary to popular ignorant opinion, even vampires love the sun and the sea
Homer ...where he discovers he's a [beat] vampire Patty:Vampires like these (points to a group of books), or those (points to another group of books), or these guys (a third group of books)? Everyone: Groans
Professor Frink: So many vampires, with the fangs and the capes and the medals. Nobody knows how they earns them.
Crichton: You're a vampire. Maldis: I admit it: I feed on death. But don't we all? Some eat plants, some meat; I consume the life essence itself- preferably medium rare.
Crichton: Why don't you just kill us? Why all the foreplay?
Maldis: Death is the main course: allthis is the appetizer.
They're not literally vampires. Sunlight, garlic, crosses, none of that applies. But we call them vampires because they're ageless super strong monsters that feed on the blood of the living.
Jack Crow: You ever seen a vampire? Father Adam: No I haven't.
Jack Crow: No... Well first of all, they're not romantic. Its not like they're a bunch of fuckin' fags hoppin' around in rented formal wear and seducing everybody in sight with cheesy Euro-trash accents, all right? Forget whatever you've seen in the movies: they don't turn into bats, crosses don't work. Garlic? You wanna try garlic? You could stand there with garlic around your neck and one of these buggers will bend you fucking over and take a walk up your strada-chocolata WHILE he's suckin' the blood outta your neck, all right? And they don't sleep in coffins lined in taffata. You wanna kill one, you drive a wooden stake right through his fuckin' heart. Sunlight turns 'em into crispy critters.