I agree with Black Guardian, it's a fun movie but not necessarily the best.
I came to The Lost Boys late, maybe in the late '90s or later. I actually liked the Frog Brothers and Haim was okay in his early days. Jason Patric is passable at best. Keifer is fine in this role. The seduction of the main protagonist to the dark side was done somewhat better in Point Break, although the hero fought against it better. Jami Gertz was awful cute. Dianne Weist and Edward Hermann were memorable in their roles.
It's definitely more stylish than Once Bitten. I also was a latecomer to Fright Night, in fact I actually just saw it in its entirety for the first time in the last month. If I had seen it growing up, I might have liked it slightly better than The Lost Boys. Well, I don't know, Lost Boys had that MTV vibe, good soundtrack as I recall.
I was also a big fan of The Monster Squad, most years I make the family watch it at Halloween. Recently I finally got around to watching all the original Universal Monsters and while Frankenstein was a far better film, I like Lugosi's Dracula. They just don't give him enough to do. I feel like he actually had more screen time in Abbott and Costello Meet Frankenstein and it was a pleasure.
I also was a fan of the 80s/90s Dark Shadows TV show. I never saw the original and I didn't love the recent Tim Burton remake but that TV show was not bad. Then the short-lived Kindred: The Embraced was pretty good.
There was just so much vampire stuff out there that honestly I was tired of the genre by the mid '90s. I liked that Buffy incorporated a lot of other monster types and was mostly comedy, that helped it out.
I loved the Blade movies, they were more action and superheroey and somewhat kung fu inspired.
Then as BG said there was From Dusk Till Dawn. Innocent Blood also goes into that category of black comedy.
I'm not sure I have a definitive vampire movie. They all have their good and bad parts. They seem to enter into almost every genre: drama, horror, action, comedy, romance. I can't remember what might have been my first one. Love At First Bite? Maybe Lugosi's Dracula? I still haven't seen the Hammer versions.
I watched the Lost Boys several times on cable back then and greatly enjoyed it, along with Fright Night. I haven't seen either one in quite a while but I have fond memories of them both.
I'd agree with what the other guys have said. The Lost Boys is a great teen vampire movie and lots of fun but my best vampire movie would probably be Hammer's Dracula or maybe even The Night Stalker.
I think it's worth mentioning the comic book store setting in The Lost Boys, though. Stores like that really weren't seen in the media in 1987 and, as a teen comic book fan, I thought that was really cool.