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.
Mac/Jo has replaced it, though it causes Ship-to-Ship Combat with the Smacked shippers and the fans of Mac's girlfriends (first Aubrey and now Christine).
Fridge Logic: If Adam and Lindsey were in "The Pile" for weeks after 9/11 and around chemicals the rest of the time wouldn't their health be a lot worse?
Harsher in Hindsight: Season 10 features an episode where a little girl dies by her friend accidentally shooting her. He'd already removed the magazine, so assumed it would be safe. Cut to a previous episode featuring Jo finally taking down a rapist she's been trying to catch since her days in the FBI. Hr words at that time may echo in your head watching the scene with the kids. "They always forget the [bullet] in the chamber."
Nightmare Fuel: The show's first official episode, "Blink" involved a real condition known as "Locked-in Syndrome," where a person is fully conscious but unable to move a single muscle except for maybe an eyelid or certain facial muscles. (communication can be facilitated with computer equipment)The French name for this translates literally to "walled in alive." Oh and if this happens to you, there is no cure (although a few patients have partially or fully recovered on their own). Think on that a while and try sleeping soundly tonight. Bonus points for it being in the first episode, too.
The inventor's House of Death in season six is pretty damn creepy. Spikes that swing from the ceiling to impale you, a room that can either roast you to death or smush you, and the list goes on. All concealed in what appears to be an ordinary penthouse.
Another episode showed a dead man hammered to a tree. Through his empty eye sockets. With railroad nails. But that's not all. Mac then finds the missing eyeballs in the man's front pocket, and we get a lovely close-up of them.
In one episode, one of the victims was embalmed in a particularly crude way: one needle vacuuming out the blood, one needle replacing it with household cleaner. The victim was jabbed both times in the neck. He was also still alive.
Another episode involved a magician murdering his victims in ways based off of his three new, high-profile tricks. The start of the episode shows him sticking his ex-assistant in a box and sawing her in half for real, using your run of the mill hand saw. Not only do they give you a lovely shot of the bloody stump where half her body used to be, but they make it explicitly plain that she was still alive as he sawed her in half.
The episode with the guy who cut off his victim's eyelids before killing her.
'Tanglewood'. The gang members used a workshop-type sander to *sand off* the wannabe's fake tattoo before offing him. Yikes.
The guy who got his head slammed in the door of a burning hot oven.
The woman who was locked in the elevator and basically cooked to death in 'Where There's Smoke'
In universe example-getting that tongue in the mail in 'Seth and Apep' was definite nightmare fuel for Mac, who retreats to his office and can't keep from imagining what might have happened to Christine, and though he's still unsettled when she calls him, at least he knows she's still alive and intact.
'Charge of This Post': Detective Flack's injuries and all those close-ups.
The Problem with Licensed Games: The game wasn't as good as the others in the franchise. It isn't totally awful, but for some reason was mostly puzzles and hidden item stuff as opposed to the more detailed evidence collecting,tests,interviewing ect of the other two shows. Plus, the puzzles can frustrate to no end, especially the "draw a line without touching the non matching items" one and the "draw the outline" one for some. Plus,each case was short,and Mac and Stella were the only player characters,as opposed to either all of the team at various points or a original player character like the rest. And fans tend to view it as yet another example of the show getting the short end of the stick.
The Scrappy: Reed. Jo is also turning into one of these after her first episode, replacing Stella.
Shipping: Danny/Lindsay, referred to as "M&M" (Monroe & Messer) and probably should now be called "3M" or "M cubed" (Messer Monroe Marriage-or possibly 3 Messers, as in Danny, Lindsay and Lucy.) Of course, once the second baby arrives, it could be 4M...you get the picture.
Flack/Angell has a pretty vocal contingent as well (including many shippers who are royally pissed at the season 5 finale).
Mac/Stella is also a favourite among fans. However, many shippers are either sad and/or angry because Melina Kanakaredes isn't coming back for season 7.
Mac/Jo is quickly taking that ship's place now.
Ship-to-Ship Combat: Mac is in the middle of most of it. Some want him with Stella, others with Jo, and others say no one can take Claire's place. a few slash ships get in too. Turns his girlfriends into The Scrappy sometimes. Very few people wanted him with Peyton, but Christine, his canon girlfriend as of season 8,isn't hated as much and adds another layer to it. However, in all the cases,no extreme hostility is usually evident.
May intensify a bit with Mac marrying Christine. Expect a few fics to show up trying to get rid of her in favor of the other ships.
Sometimes, other ships gang up on Danny/Lindsay; most often, these are shippers of Danny/Aiden, Danny/Ricki (the woman whose son was killed on Danny's watch), and especially Danny/Flack. These shippers perceive Lindsay to be The Scrappy and accuse her of changing Danny too much from his previous "bad boy" persona, inhibiting his character development, and having "too much" screentime. They would like to see Danny with "anyone but Lindsay."
They Changed It, Now It Sucks: Aside from the typical complaints about new characters, this popped up when the producers overhauled the storylines after a few seasons to replace some of the dark, gritty, weird stories with more upscale rich characters and settings. Eventually, new ones tended to get "What, another rich victim?" every time one was announced.
The Woobie: Adam. Possibly Danny as well, although he doesn't have the kicked puppy thing going like Adam does— he just can't catch a break.