I love True Blood. Alexander Skarsgard is smoking hot. Until he pops his fangs out. Then I just can't look at him.
Fangs do not belong on incisors!
Seriously, make-up effects people, you're making the sexy man look like a dork. Canine teeth, please.
"But what if the prosthetics don't allow the actor to close his mouth?" Make better teeth, or get a different actor. I've worn fake Halloween fangs, and I was able to talk and close my mouth. And those were off the shelf stuff, not really molded to my mouth.
I will grant that a double-fang (canine and incisor) is pretty hot. It's more dangerous, more likely to have a littly pain. And it will definitely leave a mark you'll never forget.
For those who want to defend the buck-toothed vampire, let me point out Karl Urban in Priest. He was perfect in his prosthetics, and knew just how to flash them.
That's how fangs should be.
...now if only I could get Orlando Bloom into some...