To dispel any rumors to the contrary, I was never a fan of Buffy the Vampire Slayer...the movie nor the series. Likewise, you can probably thank Buffy (what with all the bloodsucker love triangles) for the present-day shiny / glittery vampire love triangles. Thanks Buffy, thanks a lot. Call me old school if you like, but I still prefer my Nosferatu Bela Lugosi style.
On the other hand, cheerleader love triangles = win!