The Usual Suspects (1995)
A blistering acting showcase. Almost none of the actors here have given as good before or since. Sharp, funny, decent action set-pieces and a brilliant score.
Most famous perhaps for it's 'twist' but that is almost beside the point - unreliable narrators are a staple of crime films and this one weaves a compelling tale which matters far more than the small detail of who is actually who (I think it is about as straight forward as the ending suggests but the ambiguities leave enough room for your imagination to fill in as your please).
Dynamic. endlessly quotable and fun.