Buffy the Vampire Slayer was a completely great series, long may it live in reruns -- actually that's how I first saw it, long after the show had been cancelled. Buffy and Willow were (are) great role models for high school girls, and the dialogue was so witty and the characters in general so engaging and interestingly developed that you could overlook the occasional lameness of the plots (not to mention the frequent lameness of the cheap 90s TV special effects). I love it in the first season, maybe it's even in the first ever episode of the series, when Willow (typical nerd) shows up to school in a nondescript, dumpy jumper and the class mean girl Cordelia looks her up and down in that sneering way that only mean girls in high school have and says, "Oh, Willow, I see you've discovered the softer side of Sears."
Classic!
I also don't mind the Twilight movies (the books they're based on are another matter -- I tried to read the first book and failed, it was so badly, sadly written). I find these films have a weird but at the same time enchanting 1950s innocence to them, largely because the vampire hero and mortal heroine can't have sex for fear that he'll literally devour her, blood and gore and veins in his teeth and all. This creates a level of sexual tension between Boy and Girl that is almost unknown in our modern-day popular culture with it's upfront, full-frontal nudity and overall shameless display of what is usually (let's be honest) pretty crass and as a result very unsexy sexuality. If you compare the Twilight movies to the American Pie ones, you'll see immediately what I mean.
Also, I can't find anything really harmful in imaginary, fictional vampires who refuse to prey on humans even though it costs them terrible pangs of hunger, and instead prey entirely on wildlife. I mean seriously, are 21st-century vampires supposed to be Vegans or something?