Peggy often plunges into things, disregarding her own complete lack of skill; for example, during the episode "Phish and Wildlife," she walks onto a crime scene expecting to become part of the investigation just because she is "on a roll."

Her family dinners are a regular rotation of a few menu items: Frito pie with Wolf Brand Chili on Mondays; fried pork chops on Tuesdays; and on Wednesdays "Spa-Peggy" and meatballs,[2] the one dish which, according to Hank, "she's kind of made her own," though it is simply spaghetti with meatballs with "just the right amount of sugar and grated parmigiana cheese.

Ironically, Randy Travis did indeed steal the song, but because Peggy often takes credit for things she never did, not even her own husband could believe her.

During the episode, "Goodbye Normal Jeans," Peggy begins to feel threatened by Bobby when she discovers that his newfound talent for domestic skills means that she is out-shined by her own son.

However, Peggy makes no secret of her contempt for her father-in-law, Cotton Hill, particularly because of his neglectful, cruel behavior toward Hank.

This changed in later episodes (beginning with "A Rover Runs Through It", which depict Peggy's mother as emotionally cold towards her, her father as constantly speaking in riddles, and both of them living in Montana).

But, in the end, Peggy accepts the relationship, realizing that Lucky makes Luanne happy and is a genuinely good man.

For example, in "Lupe's Revenge" her poor understanding of the language caused her to mistakenly bring a young Mexican girl back to Texas after a school field trip across the Mexican border, confusing the child by saying "Yo vivo en México", which means "I live in Mexico" in Spanish, with "Viva México", which means "Long live Mexico".

She is a somewhat successful real estate agent who is prepared to go to extraordinary measures to make a deal, including overzealous self-promotion on her part.

[6] Although Peggy is often cited as "the hated wife and mother of adult animated TV" due to her arrogance and character flaws, Austin Jones of Paste argues that she is one of the most complex characters in the series, calling her a "keen satire on the way Southern suburbia mollifies women with talent into embittered sidekick roles to mediocre men".

[7] According to Jo Johnson of McGill-Queen's University Press, Peggy differs from the usual depiction of women in adult animated sitcoms due to the fact that she is both a mother and homemaker while also being employed.

In most other animated sitcoms, such as The Simpsons, regular employment is "bestowed upon male breadwinners or single unattractive females".

Johnson argues that Peggy's ability to comfortably juggle her role at home with a career "sets her apart from other animated mothers".

[8] Lara Karaian of Fireweed states that the characters of King of the Hill represent stereotypes of working class southern communities.

They describe Peggy as the "liberal feminist of her southern town", and is "someone who stands by her man while still remaining a strong and independent Texas woman", comparing her to Hillary Clinton.