As for the poll at hand, I like them all, with a side of "don't really care that much." But can you give some examples of these heroic vampires? Last I heard most vampire depictions in fiction are still bad guys, with a few that go against the grain.
There is a new series called
True Blood, which is based on Charlaine Harris's "Southern Vampires" series. In this world, vampires come in both Good and Evil flavors. So the main character in this TV series, Bill, is a genteel vampire who protects humans from the "bad" vampires. (Here's a clip.)
And there is the
"Twilight" series of teenage fiction novels, which also has Good and Evil vampire clans. This one's hero is named Edward. Like all the other "good" vampires in this story, he spends most of his time protecting the main character (Bella) from all of the other evil vampires.
But before all of this, the "Buffy the Vampire Slayer" series had a whole cast of monster allies, at least two of which were vampires. Angel was a vampire with a soul that kept him from hurting innocents. Spike was another ally, but instead of a soul, he had a computer chip in his brain that kept him in line. (EDIT: come to think of it, I think the Buffy vampires best fit into the Disco Dracula category.)
Blade is a human-vampire hybrid called a "daywalker," who hunts vampires and saves the day. He isn't exactly a knight in shining armor, but he is heroic by today's Dungeons and Dragons standards at least.
And before
that there was Louis Pointe du Lac, from the "Interview with the Vampire" novel. He wasn't much of a hero, but he certainly was the "good guy" of the film. He was just a vampire with a broken heart, trying to find his own way through life. Or non-life, as it were. I suppose this would make him more of a "Goth" vampire...
They are all "tarnished heroes," good guys with shady pasts and lots of emotional baggage, but are struggling to rise above their vampirism and do the right thing. Sure, they are strong and smart and good-looking...but you know that at least once each day, they are going to turn into weepy-eyed emo teenagers and complain for hours about how nobody understands them.
EDIT: "True Blood" is already out, apparently.

Thanks for the update, FS.