The Meg's family series are two fanfics written by Malcolm Fox: Meg's boyfriend and Meg's Family. It's actually one of the most acclaimed stories in the Family Guy fanfiction community.The series contains examples of the following tropes:
Abusive Parents: Zack's dad Frank can give flanderized Peter and Lois a run for their money.
Also, Cody's mom Nikki, who barely takes care of him, culminating in finally abandoning him after she elopes with her boyfriend to Las Vegas.
Demoted to Extra: Of all the six main characters, Brian has the less Character Focus. Oddly, the author stated that he likes Brian, even better than other characters that he dislikes, but have much more screentime.
Faking the Dead: Zack and Death pretend that the latter has come to claim the former. When they reveal it to be a joke, Dude, Not Funny! ensues (everyone eventually forgives him, although Meg takes a little longer to do so until he admits he would have willingly sacrificed his life to save her and Maddie).
Zack is the most prominent example. At first, he was a smart, if a bit dim witted Deadpan Snarker who was at odds with Peter. However, somehwere in the sequel, his character revolved around his feud with Peter (and his IQ also dropped severeal points)
After getting some Character Development, Tilly became a Mad ScientistBrainy Baby with awful social skills. However, her character began to fade into simply providing the invention of the week that would serve as plot device. Fortunately, both Tilly and Zack were revised in later chapters.
Identical Grandson: Averted with Maddie who according to her description and official art has a very distinctive design, while retaining some traits from her parents. Tilly and CJ are literally baby versions of Jillian and Chris respectively (well, and that Tilly is brunette).
Insane Troll Logic: In 'Swiss Family Griffins', a sleazy salesmen convinces Peter to buy a flamethrower so if the house ever catches fire, he can 'fight fire with fire'.
Stewie:She's Mary Sue. And apparently she's also my best friend, girlfriend, first kiss, she saved my life, had a Disney Death, is smarter than me, has great sex, is The Chosen One, can solve everything, and is also my long lost sister!
Time Travel: In "Time Stew", Stewie misses how things were before Meg met Zack and travels back in time to stop them from meeting each other. Later, he regrets that decision when he realizes how much he misses Maddie.
Universal-Adaptor Cast: In a similar vein to Blue Harvest, the The Wizard of Oz parody also features almost every prominent character (Meg as Dorothy, Brian as Toto, Zack as the Scarecrow, Peter as the Tinman, Chris as the Lion, Lois as the Wicked Witch, Jillian as the Good Witch, and Stewie and other kids as munchkins)