I liked the Dark Crystal a lot more when I was about 10 than rewatching it a couple years ago when I bought the DVD.
In no particular order, and some of these would probably change if I answered again sometime:
Princess Mononoke
Final Fantasy, The Spirits Within
(the special eddition was one of the first DVDs I ever bought - I watched the movie then 2 of the full length comentaries in a row, one of which showed different scenes in various stages of production)
Blade Runner
Seven Samurai / The Magnificent Seven (the western remake)
They Call Me Trinity / Trinity is Still My Name
The Good, the Bad and the Ugly
The Secret of NIMH
Dragonslayer (special effects still hold up pretty well today)
Conan the Barbarian / Destroyer
Dirty Dozen
Ninja Scroll
Ghost in the Shell
The Thing
Strange Brew
Deathrace 2000
Tank Girl (speaking of unique)