AKA: Breaking Yawn
Oddly enough, for the most part, The X-Files avoided vampire episodes. There are probably a lot of reasons for that; The X-Files is primarily concerned with Americana, and vampires are rooted in European and Asian mythology, and vampires were very in at the time (due mostly to Ann Rice's work getting a startling amount of popularity), plus Buffy would begin a few years into its run, and I'm sure they didn't want to appear unoriginal. But I also think it had a little something to do with the fact that their first crack at a vampire episode just plain sucked.