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.
Junior may have a Freudian Excuse, being heavily implied to have been molested by her father, Ragdoll Sr., as a child, but the things that she does make her extremely difficult to feel warm for. She's raped men and women alike, tortures people to death (including a priest) and enjoys using such torture implements as bricks and scissors to murder people. Before she kills people, she forces them to choose whether they die or their family dies. If they choose to die, she kills them. But if they say they want their friends and family to die, she tape-records them saying it, butchers them anyway and leaves the body for the friends and family to find, along with a recording of the victim begging her to kill their family instead of them.
Mr. Smyth, the villain of the "Depths" story arc, runs a massive slave trade operation. The way he "disciplines" his workers is to have his assassins butcher and murder the people around the disobedient slave, while forcing them to watch. He thinks slavery is the greatest thing ever and will fix all the world's problems and wants every nation to have it via lottery.
Dwarfstar is a crazy, misogynistic serial killer. His first words to Bane upon joining the Six are a question of how many women he's killed. Sure, Cheshire is bad, but Dwarfstar is completely and utterly repugnant even when compared to her. Given the team's current membership, however (an immortal, immensely strong banshee, a sociopathic female assassin, and a giantess), he probably won't be alive much longer. Bane takes an instant dislike to him. After failing to kill Ryan Choi after so long, he hired Deathstroke's Titans team to kill Choi. And he wanted the miniature corpse in a matchbox for a trophy, which he received with a big shit-eating smile on his face. For that, Giganta beat him with his own belt so badly that it broke every bone in his body. Unfortunately, based on the latest issue of Titans, he's still clinging to life in a Louisiana hospital. He told Ray Palmer that it was Deathstroke who murdered Ryan, and Ray pointed out that Slade probably won't take kindly to this development.
Vandal Savage force feeding Cheshire and Dr. Psycho steaks cut from Solomon Grundy. Starts off disgusting, but Savage's matter of fact remarks about it and Dr. Psycho not really minding ("I don't mean to be rude, but mine's a bit chewy.") bring it around to funny.
Jerkass Woobie: Pretty much all of the Six but especially Bane, Catman, Deadshot, and Scandal.
Take That, Scrappy!: Tarantula's death. The character is not popular due to the epic Double Standard involving her actual raping of DC Comics fan favourite Nightwing, and the fact that she was accepted into his team, the Batfamily, afterwards. Suffice to say, many cheers were had when she finally got her comeuppance and died.
Tearjerker: Issue #36, featuring the last stand of the Secret Six.
From #13, Jeannette briefly hallucinates that it's her birthday, before she was executed and became a banshee. Artemis and Bane are debating whether to leave the addled woman behind, but Scandal won't have it. Then reality begins to hit Jeannette.
Jeannette: Oh, and there'll be roast capon and figs and cakes and the most interesting of restraints... wait. Wait. He's cut off my head, hasn't he? My husband. He's cut off my head.
Scandal: Yes. I'm sorry.
(Jeannette falls into Scandal's arms and both begin to cry')
Scandal: You were... you were betrayed.
From #34, the Six return from hell just in time to save Liana from the psychotic Randall. As the other members make Randall run a gauntlet, Scandal rescues Liana, who, despite everything, doesn't want them to kill Randall and asks Scandal to swear not to kill him. Scandal does, and hands Liana to Jeannette... and then she kills Randall. And then immediately after:
Scandal: Would someone... would you one of you three men I love... the only men I love... please hold me for a moment?