Dune
Remember really liking this, but not nearly this much, could only think about how amazing Dune 2 is going to be.
I feel like this is just kind of a perfect introduction to this world, guides you well enough through the characters and the narrative surrounding Paul Atreides, and immerses you into this said world with so much beautiful imagery and sequences, with an amazing score to go with it. All of the misticism and foreshadowing feels so epic and grand, and helps make this story feel so large and exciting to follow.
Dune