[Phat Mack]

In no particular order, some of my faves.

Alphaville. Goddard film. I think it's great, but I'm a big Goddard fan, so it's hard for me to keep him off of film lists. This one is about a PI who goes to a weird town on a distant planet.

Week-End. Goddard again. A french couple go off on a vacation. We soon discover that they aren't in Kansas any more. As far as cultural impact goes, Week-End may behind 2001 and Strangelove, but I think it's my favorite.

There's another Goddard film where the guy keeps waking up. He has an adventure, then wakes up to find he was only dreaming, has another adventure, wakes up, and so on until they run out of film. Maybe it's not a Goddard film. Maybe I only dreamt it. Don't suggest that I'm confusing it with an Italo Calvino novel--I'm not. While I'm forgetting titles...

The one where they find the monster while digging the London Subway. It looks like a cockroach, but it's from outer space.

Planet of the Apes. I saw this projected on a bed sheet out in the Nam boonies. I thought it was so cool when we see the Statue of Liberty at the end. At the time, I thought it was about race relations. I don't know what people think about it now.

Fahrenheit 451. Great flick, and, looking back, a little to prescient for comfort.

Destroy all Monsters. Bargain pack of Japanese Sci-fi.

Time Machine. Seeing this as a twelve year old, I thought this flick was loaded with hot babes. When all is said and done, what else could I ask for?

Dr. Strangelove

2001. These last two are great, and have been well described by OP.