Bogart and Bacall - Least interesting of their films together
'To Have and Have Not' and 'The Big Sleep' succeed in large part because of the obvious chemistry between Bogie and Bacall. A big part of that chemistry was the flirty repartee that went back and forth between the two of them. There was a wonderful edge to their exchanges because neither was quite sure they could trust the other. Bacall's characters were always 'bad' girls in one way or another, which was precisely what drew Bogie's characters to her.
The relationship in Key Largo is much less interesting, because Bacall's character is a widow, and some kind of saint. There's no trace of the bad girl in her and that sucks all the interest out of the scenes between her and Bogie.
I was a little disappointed in this film the last time I saw it.