I recently read an article at an entertainment blog that talked about fang position in vampires. Seems people have their preferences. The most common place for fangs seems to be the canine position, with the lateral incisor position as a close second. Though some movies and books have placed the vamp's fangs front and center.
Fangs can be tiny little things that might only puncture through the skin and the vein, or massive, gnawing instruments of destruction. Some can be willed down by the vampire, others are permanently down. Some flick out and retract back against the roof of the mouth, much like snake teeth (as I've been told they do in True Blood).
This is my opinion: it doesn't really matter where the fangs are, or how they're shaped. What matters most when the vampire is drinking his victim's blood is that the fangs are out of the way when it comes time to suck blood. Yes? You only need the fangs to puncture the vein, then they should retract so you can do some serious feeding. Because how to feed when those pointy things are in the way making a mess of the flesh?
On the other hand, some horror vamps probably prefer that total destruction of flesh, veins, and the entire neck, so they have no worry that their fangs are down. Think Blade and those wicked hinged jaws full of deadly fangs. And Nosferatu featured the fanged central incisors.
So what about you? Do you have a preference for fang placement? Do you think it matters?