Scarface (1932). Ambition, bloodlust, cowardice. Good flick, especially after you get used to the 1930s-y acting. (My wholly uninformed but standing assumption is that the 1983 remake is far inferior.) I was pleasantly surprised with some of the tracking shots and felt proud when I figured out the X motif (spoilers!). The only other Howard Hawks works I’ve seen are The Big Sleep and Gentlemen Prefer Blondes.