I have two pet peeves when it comes to screenwriting: expository dialog and character-development dialog. As Amy and I are watching the DVD's of the Showtime series "Weeds" (the one about the middle-class suburban pot-dealing single mom), both types come up frequently enough that they are starting to turn me off of this otherwise decent show.
If you Google for "expository dialog" you'll find I am certainly not alone in hating the dreaded monologue that only serves to explain often convoluted plot points to the audience. But what irks me are the small, throwaway lines that ring false and could clearly have been cut or incorporated some other way.
In an episode we watched last night, for example, a character, Celia, is in the hospital recovering from breast cancer surgery and her mother arrives unexpectedly. The situation is clearly awkward -- the actors do a good job of expressing the decades of tension that exist between them. But then the moment is blown when Celia says to her mother: "Thank you for coming all the way from Florida to see me."
If both Celia and her mother know that mom lives in Florida, why is that bit of dialog necessary? If my mother suddenly appeared at my door, I wouldn't great her by saying: "Mom! You came here all the way from St. Louis!" No. The line only exists to inform the audience that Celia's mom lives in Florida.
How else could the screenwriter have conveyed the information? Well, after a few more rounds of more honest-sounding dialog, we learn a lot more about Celia's mom -- she's active in her church, she's leaving soon to go on a cruise, she's a miserable control freak. At some point, a more indirect reference to her home in Florida could have been slipped in. But I'm not even sure why it was necessary to establish that she was specifically from Florida anyway. Had she arrived carrying a suitcase or had Celia merely inquired about her flight ("How was your flight?" is a banal question but one that we all ask, right?) then we, the audience, could get everything we need right then.
The other class of cringe-inducing lines are the ones that exist only to establish some aspect of a character's personality or physical appearance that might not be obvious through, say, acting or just looking at an actor.
The most egregious example of this I can recall was in the dreadful 2001 movie Amy's Orgasm (AKA Amy's O), starring, written, and directed (uh oh!) by one Julie Davis (who, not coincidently, hasn't appeared in any movies since). Ms. Davis is fairly cute, but the movie's dialog is packed by other characters commenting on just how gorgeous and super-hot she is. The premise of the film requires that the main character's desirability simply be taken for granted; it's supposed to be a shock when others learn that she hasn't had sex in several years. But the actress herself isn't really a knock-out, so the dialog has to try to convince the audience through incessant repetition that she's the most beautiful woman in the diegesis.
Sadly, this sort of dialog is starting to spoil my enjoyment of "Weeds" as well, and as with Amy's Orgasm it involves the physical attributes of a female character. Mary-Louise Parker is the pot-dealing mom, Nancy, and I'll admit that she is pretty damn hot. It's also apparent from looking at her that she has practically no ass. And yet, there have been, on average, a half dozen references to her supposedly hot butt in every episode. In one, two African America characters independently comment on her "badunkadunk" (alternately, "ba-donk-a-donk").
I don't understand why the screenwriters felt it was necessary that Nancy's obvious physical attractiveness be augmented by repeated hyperbolic references to her virtually non-existent booty. Is it really that important that all the ass-men (and women) in the audience be catered to? Are they so insecure about Mary-Louise's actual ability to induce lust that they have to verbally inflate certain of her assets?
It's really too bad because I'm now so tuned in to it that I'm afraid I'm not going to be able to keep watching the show unless the scripts drop all this "establishment" bullshit and focus on keeping the dialog real.
Amy and I saw the documentary
And though the differences are small, they are perceptible if you know where to look. Simonson also provides 
