Straw Dogs (1971)-- there is much to recommend this film. Superb acting by all involved, even the minor characters. There are so many little backstories left unexplained, that could make fascinating films in their own right:
For example, the background on Tom Hedden, and why he is the way he is. He's had some tragedy in his life, as is inferred when it is said of his unseen daughter Emma that she was "put away" (presumably institutionalized).
The nature of the relationship between the brother and sister, Bobby and Janice.
David and Amy-- how did such seemingly polar opposites get together in the first place?
And others which I haven't mentioned.
But aside from all this, the very atmosphere of the movie reminds one of a simpler time. Early 1970s-- no computer distractions. No cell phones. A small town. Quiet. Not much going on at all in the way of home electronics.
This film was made just a few years before I was born, but looking back on my (very few) memories of the late 1970s and (much more complete) memories of the 1980s, I can appreciate the slower pace of life depicted in this film; in many ways it is its own character in the film. (I too grew up in a small town).
Of course, the remoteness and insularity of the town come back to haunt David as the film reaches its violent climax, but prior to this we can see why David would want to move to such a place in order to pursue his studies in uninterrupted contemplation.
Anyway, these are just my random thoughts on the film to get the board started:)
Feel free to add your own.