Man what a broad question! There are so many good movies out there that its tough to keep the list short!

The Mad Max series
Gladiator
Braveheart
The Patriot
Robin Hood, Prince of Thieves
Goonies
White Fang
the Alien series
Alien vs Predator
Twelve Monkeys
Breakfast Club
American History X
Fight Club
Equlibrium (strongly recommend if ya havent seen)
Wedding Crashers
Lord of the Rings
way too many to list...I could go on forever

Anime:
Full Metal Alchemist (excellent series)
Akira
Ninja Scroll
Princess Mononoke
Vampire Hunter D (the new one is better, "BloodLust"
Appleseed
Spirited Away

TV Shows:
Firefly (awesome)
Serenity (the movie following Firefly)
Friends
Scrubs
Heroes (once available on DVD)


dunno....I love any and all movie. cartoon, pixar, chick flick, fantasy, action / adventure, comedy