Not wanting to let Dan C’s excellent question get lost in The Matrix spolier thread I have copied (and slightly edited) it to here.
[quote]In this ‘fast food film era’, it’s rare that a film leaves me with so much unanswered questions as this one. Or forces me to watch it a second time to better connect the dots and/or appreciate it even more. Arlington Road did it. Sixth sense did it. Devil’s Advocate, Neon-Genesis Evangelion (specially the last episode)
Anybody have similar experiences ? Your film list would be appreciated. [/quote]
A few I can think of straight away are
The Usual Suspects.
Mulholland Drive (has been thrashed to death on here already).