In light of this discussion, I watched Ralph Fiennes's film adaptation of CORIOLANUS today. Emphasis, of course, on "adaptation" -- the text is radically reduced from the source. Fiennes does an amazing job as a screen actor of attempting to fill in the gaps that the text does not fill regarding Coriolanus's -- by my count, he smiles only at one moment in the whole film, when we first see him with his "sweet silence" of a wife and his child after his return from routing the Volscians. His performance doesn't make fix the problem that the text leaves us with -- too little information about his inner life, what drives him, how he got this way, and what changes in him. But it is certainly watchable.
What I really liked, though, is Brian Cox's take on Menenius. Here's a good interview with Cox in the Telegraph that underscores Cox's and Fiennes's interpretive choices with that role: http://www.telegraph.co.uk/culture/film/starsandstories/9027156/Brian-Cox-in... .
--Mike