Really hard to just pick one but it's a toss up between Let The Right One In and George Romero's Martin.
Years ago they ran a weekend of 'weird nights' on uk tv, and GR's 'Martin' was the vamp movie they chose to show. It has been many years since I watched it, but I remember thinking it was quite interesting, him not really being a vamp and using syringes, I don't recall much about it, but I still have it on tape.
I remember there was one bit I found funny, when his grandad/uncle took him into his house and he said something to Martin along the lines of, and in a pure Van Helsing type voice 'If you do anything wrong... I will destroy you!...' and then really politely, '...I will show you your room.' haha
I'll have to dig it out and watch it again.
John Carpenter's vampires...man, that scene where the vamp shows up at the motel and decimates the gang of vamp killers, that was frickin brilliant, again, been many years since I saw it, it was alright as I recall, but I was really disapointed that it didn't have anything else in the movie as good as that early scene.
Near Dark, that was pretty good, a bit of a quiet, take it's time vamp movie, I just remembered I still have my pal's region1 dvd of that, my region1 dvd player doesn't play sound anymore, so I can't watch it.
From Dusk Til Dawn though, man, there is nothing better than watching that movie with someone who has never seen it and doesn't have a clue what it's about, just waiting to see their faces when the movie changes genres.
Someone on another messgae board, a guy who worked in the industry in some copasitty as an indie filmmaker/produer, so maybe he knew something we don't, but he said that Tarantino directed the non-vamp half and Rodreguiex did the vamp part, might just have been him speculating though, cause I recall on the extras Geroge Clooney going up to RR outside the shop at the beginning and asking him about the scene. Maybe Tarantino couldn't shut up and had to have his say sometimes though, haha, or RR asked for his opinion. edit: anyway, not to take any credit away from RR, I was just curious if that was something anyone else had heard about, probably just that guy speculating and RR directed the whole movie.
Man, if you were watching that movie with a bunch of your friends, after that scene in the bar with Clooney and Keitel, you all just had to go out and get drunk, haha.