This isn't to say that I didn't enjoy the movie, because I did: it's a very interesting watch, and it holds your interest even when there's not much going on plot-wise other than Mose and Addie driving down a dusty, deserted road, arguing vociferously:
Even Miss Trixie, whom I've been referring to as a floozy (because she is one) has unexpected depths. She's played by Madeline Khan, who does a great job on this monologue when Addie, furious over the addition of Miss Trixie to their road trip, is refusing to get back in the car. She starts out trying to use her accustomed charm and flattery on Addie: it doesn't work, so she switches to attempted bribery and then angry threats as Addie remains stubbornly unmoved. It's only when all of this fails that Miss Trixie resorts to the truth, showing a surprising amount of self-awareness. She tells Addie not to worry, she won't be around for too long; somehow she can never manage to hold onto a man. So, in these hard times, she goes with a guy and gets what she can out of him, until the relationship- if it can be called that- runs its course and she moves on. Trixie tells Addie that, if she cooperates, they'll all get a little something out of it and soon she'll have Mose to herself again.
To sum up, I really enjoyed Paper Moon, with it's great characters, skillful dialogue, and the road trip plot which alternates between a rather meandering pace as Mose and Addie travel from town to town, and sudden bursts of frenetic action- usually when they're trying to flee the consequences of their own actions. My only reservation is the seeming dismissal of Addie's aunt as hopelessly moral and upright, as if this is a bad thing. Or at least that's what Addie has come to regard it as, which is a sad thing if you thing about it.
I'll leave you with the movie's trailer: