Good: Love Howard Hawks and there are so many great choices, but I'm going to go with The Big Sleep. Bogart is a terrific Philip Marlowe (even if he was arguably an even better Sam Spade), and Hawks understands that the plotting of Raymond Chandler novels is less important than the dialogue and tone. There have been several fine Chandler adaptations, but I'd argue that this one does the best job of recreating the feel of his writing.
Bad: Hatari!, a generally bad idea which misuses John Wayne pretty spectacularly. It's moderately entertaining at times, though.
Ugly: I'm hard-pressed to come up with something. Surely Hawks has made a horrible film somewhere along the line, but I've seen quite a few of his flicks and simply can't bring myself to call any of them ugly.