The Lord of the Rings is fantastic as a movie, but average as an adaptation. There was too much left out, made different, and too many things added in that either didn't make sense, were impossible where the book is concerned, or were just plain uncomfortable. Like Frodo telling Sam to go home for instance.
Star Wars. Come on....who doesn't like Star Wars?
Back to the Future. Best time travel movie by far.
South Park: Bigger, Longer and Uncut. Yeah it's smutty, but it makes a really great statement about how ridiculous censorship is. Plus it's a great musical. Even if the songs weren't hillariously written lyrically, they would still be good songs.
I watched 28 Days Later today for the first time. People told me it was scarier than Dawn of the Dead so I had to watc it. I have to say I was a bit dissapointed, because I really didn't think it was scary. More of a comedy really. There wasn't even much "infected" scenes either. The real protagonists were the soldiers. It was still a pretty good movie though.