The Pirates of the Carribbean

[WarLocke]

Off the top of my head, in no particular order:

Donny Darko - Very unique, unique take on time travel and/or psychosis (depending on who you ask). Not really scary like a horror flick, but definitely disturbing.

Alien - The definitive Sci-Fi horror flick, IMO. 'Nuff said.

Aliens - An action flick, diverging from the previous title's roots, but still a classic.

Terminator 1/2 - Do I have to explain? B)

Deep Impact - Way better than that overrated Armageddon crap.

Ghost Dog - Forest Whitaker as a black urban samurai. An independent film, IIRC. Well worth the watching.

Stargate - Just 'cuz I like it. Alot.

I could go on all night, but these are the ones that jumped out at me first.