These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Audience-Alienating Premise: Sometimes criticized for being too depressing, graphic, and hard to read. The sequel seems to be even more depressing.
Complaining about Shows You Don't Watch: People criticized the movie for trying to glamorize black poverty. Even though every second of the film was dedicated to showing how Precious' upbringing in this ungodly nightmare of a ghetto has all but completely ruined her life, leaving her a 16 year old illiterate, obese, HIV stricken, mother of two, that is still in the seventh grade.
Jerkass Woobie: Despite all the horrible things she did (hinted at in the film, stated more clearly in the book), who didn't feel a little sorry for Mary during her "Who's gonna love me?" speech?
"Funny Aneurysm" Moment: After hurling the television set at Precious and her son, Mary grumps back into the apartment, doesn't even bother to clean herself up, flops into her chair, picks up the remote and...
"Precious' son Abdul looks just like his daddy." In the sequel Precious succumbs to AIDS and Abdul is put into an Orphanage of Fear where he's abused and raped and eventually becomes a violent rapist.
Narm: The Bleeders just plain looked silly when they screamed, except the one at the end, who was much more powerful than his two sons who had just been killed.
Relationship Writing Fumble: If the reviews and fan reactions are anything to go by, whatever relationship thirteen year old Cassie and twenty three year old Nick were supposed to have wasn't what the audience saw.
The marble scene in the beginning is taken almost directly from a part in Ted Dekker's book Blink, a book where the main character can see potential futures. When he's about to be arrested, he rolls a rubber ball down the hall, timing it so that it will bounce off the right walls, causing a distraction so he and his Love Interest can get away. Could have been a Shout-Out though.
Its far closer in plot to Scanners and Firestarter.