The third episode features a porn star who asks Hank if she should get breast implants, even though he points out that her breasts are fantastic. The character was played by actual porn star Brooke Banner, who though famous for her natural breasts, went on to get implants a few years later.
A season 5 episode features a cop who jokes about having shot a black kid whom he thought was carrying a gun, which was actually an iPod Touch. After the shooting death of Tamir Rice (and other high profile cases of Police Brutality targeting unarmed black men)... not so funny anymore.
Seasonal Rot: The opinion of a few fans and critics. Generally seen as occurring after the first 3 seasons or so, when the characters started to suffer more from turning more into caricatures.
Tear Jerker: Could also double as Heartwarming Moments. In the season 2 finale, the opening scene as Hank finishes typing his manuscript with Warren Zevon on the stereo Ashby appears, converses briefly, then says "It's true what they say. Got a hell of a band." Then he disappears and we find out he did OD.
The Scrappy: Season 4 has seen a marked downturn in the ability of the audience to tolerate Becca's whining, monotone and flat character and an annoying subplot involving a bunch of just as annoying try-hard 'bad chicks' and their garage band.
The Woobie: Oh Becca, why can't you find a Nice Guy to have a sweet, non-overly sexual, first/second relationship with?
Charlie can sometimes be this when he's not being a plain Butt-Monkey (although he does have a tendency to bring his misfortunes on himself).