Will be regarded as a classic, as will Gyllenhaal's performance.

Rating: 10/10 (27 January 2015)

SPOILERS
First, yup he is a textbook sociopath. It's underlined when his partner/employee says 'you just don't understand people,' but we really don't need telling. But we've seen sociopaths on screen before, so why is this one so much more compelling than most? Because it would have been such a lesser film if he was your typical evil psycho. He was like a mix of Travis Bickle and Ted Bundy (two very different characters). Plus his usually unintentionally bizarre or hilarious (verbal) responses to many situations.. I was laughing as much as finding him morbidly fascinating. I predict some will become classic movie quotes. He thought he was handling everything perfectly! Yet clearly (to us) was seriously not normal, as his boss finally saw with his completely misjudged attempt to woo her.
Gyllenhaal was mesmerising so you could see why some characters saw his confidence as a positive trait - but we the audience could tell he was seriously screwed up, but in a way that was so uncliched, and ultimately much more realistic - and therefore genuinely chilling. There *are* people like this. Everywhere.
Also, cinematography: one of the best things about the movie. The 'teal and orange' trend in so many movies is driving me mad! It's so distracting and annoying once you begin to notice it. But this movie had a broad range of colours, used very carefully, throughout that were just perfect. People often think great cinematography has to be 'showy' - here it just made a great movie a visual masterpiece too. Many scenes were much like paintings, by an artist that truly understands how to use colour.
I wonder who wouldn't like this movie? I can only think 'idiots with no taste'. No offence, idiots with no taste, you have plenty of movies aimed at you anyway.