Event Horizon

Ju-On - The Grudge. I was probably too young when I first watched it but it was the one that got me truly into horror.

The Lodge was unexpectedly good.

Arachnophobia. Strangely enough, it helped me get over my fear of spiders.

Splice. Unfortunately.

Poltergeist, but only because I watched it way too young.

Phantasm

Ich seh, Ich seh (English title: Goodnight mommy). Spoiler: >!The child had Schisophrenia. I just felt bad for the child.!<