200 Items Or Less: It Came from Outer Space (1953)
A few thoughts: As a fan of movies about aliens invading a small town, killing and eating the townsfolk, and being defeated in the end by unlikely heroes, it should come as no surprise that this was a very fun watch for me. It's actually much more intelligent than what I described and manages to stand out from the crowd in an era riddled with these clichéd b-movies. I loved the creature design (what little you see of them), and I found the second act twist a very likely change of pace, adding much more depth and personality to the creatures. This isn't as generic as the name might imply. The effects are wonderfully dated, but it never takes away from the enjoyment factor -- honestly, I think it only enhances it. I think in the end, this isn't a sci-fi/horror movie that stands as particularly get within either genre, but more as a solid blend of both, and a pretty insightful look at hysteria and fear of the unknown. It hits all the right notes and definitely stands the test of time.
Who would I recommend it to? Fans of the kind of movies that could be called "It Came From Outer Space". You know who you are.