The Coen bros. seem to have followed a formula that has worked for them even from their earlier works with movies like Blood Simple. It is good story telling which is pieced together with a fair amount of action and some what graphic violence. While the story is generally interesting and holds the attention the films seem to have a certain mysterious element to them as if they purposely leave out certain bits of information from the original script. Whether or not this is actually done purposely I am not sure but for me this what what makes the films of the Coen bros. worth a watch.
We have interesting characters, a nice screenplay and enough violence and bloodletting to give the movie some replay value.
A drug deal goes bad (people die), a man finds the money (people die), a ruthless serial killer wants the money (people die), and the police want the money (people die). Its one big game of cat and mouse and did I mention people die?
No Country For Old Men is an exception to the rule that movies from the 2000's are a complete waste of time. I'm looking forward to the Coen brothers next release.