There are a huge number on this list for me, since I've been watching the stuff since before I could walk (which puts it at about 48+ years....
) so I'll only name a few....
Harryhausen's films, especially
7th Voyage of Sinbad and
Jason and the Argonauts -- certainly two of my earliest favorites, full of warm memories (indeed, indeed, Nesa!), not to mention some of the niftiest stop-motion animation ever put on the screen, a wonderful fairy-tale/legend story, and those absolutely superb Bernard Hermann scores....
Curse of the Cat People -- because it captures perfectly the wonderful, strange imaginative world of the special, gifted child, and is almost heartbreakingly beautiful.
Death Takes a Holiday -- a wonderful blending of comedy, romance, horror, fairy-tale, and deep insight into the human heart; coupled with
On Borrowed Time, two of the best films to date on the subject of death and its place in our lives, both good and bad, with superb performances to boot... (
Outward Bound runs a close second there, by the way....)
I'll have to go with
The Nightmare Before Christmas myself... love that film (I, too, have a passion for Halloween, and fall is my favorite time of the year). The animation, Danny Elfman's score, the characters, the story... just a delight, that one. (I'm also going to put
The Corpse Bride up there close to it... I'm a sucker for this sort of thing....)
2001: a space odyssey -- because it remains one of the most fascinating, beautiful, and enigmatic sf films ever made... not to mention one of the most intelligent.
Silent Running -- sf (ostensibly), but more of a parable, really... a film that just shouldn't have worked, it has so many logical flaws... yet somehow it manages to get to you... partly because of the chemistry between Lowell (Bruce Dern) and those little drones....
Blade Runner -- one of the most beautifully imagined futuristic milieus ever put on film, great performances, lots of mythic layers, broad yet subtle interpretation... just a lovely film
The Fellowship of the Ring -- while I quite like the entire set (despite some serious flaws), this is my favorite... because it is closest to capturing the essence of Tolkien's world (I'm speaking of the extended version here -- I don't care for the theatrical version, I must admit... too hectic); again, beautifully set forth on the screen, and that confrontation with the Balrog....!
The Golem -- one of my favorite silent films of the fantasy genre (I wonder if people realize just how many fantasy films there really were in that era?)... a lovely atmospheric study, a fairy/folk tale very well told, visually captivating, and full of quirky humor as well....
Metropolis -- simply a stunning film... visually, emotionally, in so many ways. Yes, it suffers from the rather histrionic acting at times, but somehow even that often works within the context of the film... and there's always the Ultima Futura, who has long been a pop-cultural icon...
I'd include some of Lon Chaney, Sr.'s films here, but really there's little true fantasy to them... the closest being
The Phantom of the Opera, one of my favorites, certainly; but he was one of the earliest stars of the allied field of the weird/horror film, and I simply love watching Chaney work....