Walkyverse/YMMV

It's Walky!

 * Fan Nickname: The organization that Jason's father heads was never given an actual name. Fans eventually took to calling them the JFO (Jason's Father's Organization).
 * The Head Alien was dubbed "Dexter" by fans . This was never seriously used in the comic, though it was was referenced during the Fans crossover.
 * In the Dumbing Of Age continuity there's a cartoon called Dexter, The Head Alien.
 * Magnificent Bastard: Head Alien, and in the final arc, Penny Worthington.
 * And arguably Mike.
 * Mood Whiplash: Oh dear sweet lord, SO MUCH. Routinely switches from grief over main character deaths to Toilet Humor. Oddly, this can heighten the dramatic effects - the characters are so used to that sort of thing by the end of the comic that they move on faster than the reader does.
 * Wangst: Sal is especially prone to this, and it starts getting lampshaded early on. Jason finally had enough of it in this strip.

Joyce & Walky!

 * Flanderization: Carol (Joyce's mom) has become solely defined by the I Want Grandkids trope.
 * Fridge Horror: Head Alien II's monologue about how he was free to drift from dimension to dimension destroying SEMME over and over has a panel of dead agents drawn in the style of Willis's elementary-school work, implying that he pretty much wiped out that Lighter and Softer world. Holy crap.