Scarface is great if you watch it right.Mystery Science Theater style?
As a melodrama/satirical comedy about the excess of the 80's, and not some realistic gangster drama. It's the one film (JFK aside) where Stone's tendency for gratuitousness pays off (though it being De Palma's film certainly helps). Think of it as Douglas Sirk goes Cuban gangster.
Too bad so many people put the poster on the wall and treat Montana as some sort of icon, and in turn, hurt a genuinely terrific picture's reputation.