One I haven't seen recommended yet is "Stories We Tell". A bit unique and definitely one to see without reading too much on it. As for others that people have

One I haven't seen recommended yet is "Stories We Tell". A bit unique and definitely one to see without reading too much on it. As for others that people have already mentioned, I'd second the nods to "Touching the Void", "Encounters at the End of the World", and "The Act of Killing".