An Alfred Hitchcock / David Lynch / Stanley Kubrick mashup
Alfred Hitchcock because it's a murder mystery! Or is it?
David Lynch because there's a plethora of oddball characters, and an aura of weirdness that hovers over the events and characters.
Stanley Kubrick because no one in this movie is a sympathetic character that we can root for. There's a dispassionate self-absorbed emotional coolness to everyone. (Part of this is due to the LA/Hollywood setting I think...)
It's a hypnotic movie to watch and there are lots of WTF and I-did-not-see-that-coming(!) moments. Still not sure how I feel about it...