I saw a Jeremy Jahns video highly recommending Nightcrawler, so combined with your recommendation, I suppose I'll look into it!
Just saw the Citizenfour documentary film (about Edward Snowden) last night, and I thought it was spectacular. It certainly didn't have the sensational flare that some documentaries go for, so the pacing could sometimes feel boring and slow, but that's not always a bad thing. Usually such methods to "spice up" a documentary also fill it with fluff, or worse, total falsehoods. No, this film focused on the information, the interviews, and a couple other conferences held by others who felt similarly about the U.S. government's overreaching powers, but didn't have the same access as Snowden did to bring it to full attention. It was very informative, and simultaneously humanizing. If it's playing anywhere near you, I highly recommend it!