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.
YMMV: Detective Conan
Alternate Character Interpretation: After all those times being put asleep, one may wonder if Kogoro really doesn't understand what's happening, or if he's just using Obfuscating Stupidity, letting Conan do the dirty work and enjoying his incredible detective reputation without having to do much.
Kogoro Mouri has been interpreted as having actually figured out Conan is actually solving the crimes for him and after awhile, just let him solve it for him while he receives the credit for it. Kogoro already isn't a bad detective; he's just got an extreme case of Tunnel Vision and wants things to be done as fast as possible, so he'll come to one conclusion a detective would, but then insist he's right until proven wrong. Whenever Ran or Conan are threatened, he actually becomes scarily competent. (Kinda like Inspector Gadget whenever he knows Penny & Brain are threatened) There have been several other times where he actually got it mostly right, and several times where he solved the case and only needed a couple hints from Conan, or in one occasion, not only solved it but got a couple details that Conan missed. (It also helps that he tends to be more street-smart while Conan is more book-smart - Kogoro has more insight into peoples' emotions)
Shinichi Kudo = genius or selfish, immature Jerk Ass who places himself above the others and doesn't really get the meaning of death and for whom each dead person is nothing but challenge?
You can make the case that he starts out as a selfish Jerk Ass, but as the series progresses and Character Development sets in, becomes more attuned to the human nature of the cases, especially after the Moonlight Sonata case since in episode 78 when Miyuki Hyuuga tries to kill herself and Conan thwarts it, Heiji explicitly asks why he did that, and Conan says "a detective that allows a suspect to commit suicide is no better than a murderer", Moonlight Sonata flashback included.
Angst? What Angst?: Every school girl and child seems to be completely unfazed by witnessing grisly murder scenes virtually every day of their life.
Averted in the first episode, when Ran breaks down crying after a grisly murder mystery that involves a guy getting his head cut off using piano wire and the speed of a roller coaster. She asks why Shinichi is so collected, and he replies that he's simply used to it.
Arc Fatigue: The main story. Started in Chapter 1, it was intermittently advanced for the first couple of years per the story premise, but the updates keep getting farther and farther apart. Some breaks even span a little over two years such as the most recent gap between the Red Shirts case and Mystery Train case.
Broken Base: A number of fans consider "anime original" episodes (episodes written specifically for the TV series by its own writers, rather than adaptations of issues of the single-author manga) to be of generally inferior quality.
Crowning Music of Awesome: Apart from being an awesome song in its own right, whenever "Kimi ga Ireba" (the vocal version of the movie opening theme) starts playing in one of the Non Serial Movies, something awesome is usually about to happen - most often, some unsuspecting baddie is about to receive the butt-kicking of a lifetime. (Sometimes they use "Boku ga Iru" instead just for variety.)
Cult Classic: In the U.S. Since it aired at such a late time even for the [adult swim] schedule, the show never found that strong a following compared to its massive success in Japan. The manga, however, does have a decent enough fan-following and Viz has been translating the graphic novels for nearly a decade now (they're nearly at volume 50!)
Though he does lose some of the uncertainty that makes him such a monkey as time goes on. (For instance, in "The Man Who Called for an Ambulance" he ends up delivering a lecture to a more senior detective about jumping to conclusions that Conan silently applauds.) However, it looks like he will always be a monkey where his relationship with Satou is concerned.
Die for Our Ship: Ran from the Conan/Haibara fans, as already mentioned. Surprisingly, the Shinichi/Heiji shippers are more respectful, or at least leave her out.
Dude, Not Funny!: How some people see Kogoro physically punishing Conan as bordering on Child Abuse.
Ensemble Darkhorse: Many, depending on how you define "dark." One one hand, people as recurring as Ai.
Since being imported into Detective Conan, Kaitou Kid has consistently been ranked as the 2nd most popular character in the series behind only Conan himself.
As for Subaru, There are two main theories in fandom about his identity: he either is the high-ranked Organization member Bourbon (always alluded to, and hinted to be very powerful and dangerous), or Shuichi Akai who is now Faking the Dead.The last turned out to be true.
"Funny Aneurysm" Moment: The Non-Serial Movie of April 2001 happened to be about a Twin Towers being bombed. The conspiracy theorists make this one worse as it was a controlled explosion by an undercover organization - which happens to include evil politicians amongst its membership - that pretty much get away with having any suspicion pointed towards them.
Oh, it gets worse. A few days before the 2011 earthquake, they released a trailer for Quarter of Silence... which had the clip of the ginormous amount of water from the damn advancing on the village and violently taking out the bridge. The movie itself came out about a month after the earthquake, in a sort of Reverse Funny Aneurysm Moment in a different way from Hilarious in Hindsight.
Germans Love David Hasselhoff: The series—especially the manga—is very popular in Indonesia. As of October 2013, the translation has advanced as far as the latter seventy volumes.
Internet Backdraft: Due to the Ran/Ai shipping wars, anyone should check their favourite forums' rules for discussions on these pairings. In many places comparing the pairings or even comparing the two as characters would get you banned even you're being neutral.
Jerkass Woobie: There is a murder in which a business tycoon is killed on a boat (the infamous Hatamoto Family case). One of the suspects, his eldest granddaughter Akie, is an absolute Rich Bitch, surpassed in obnoxiousness only by her husband Tatsuo. She becomes a Jerkass Woobie when Tatsuo says terrible things about why he married her (Akie's little sister Natsue turns out to be the heiress, so Tatsuo openly says he only married her for the money much to Akie's horror), but then she cries heavily when he becomes the next murder victim. She's even seen cradling Tatsuo's lifeless body in her arms.. As much of a bitch as she is, well... no one deserves that.
Narumi/Seiji from the Moonlight Sonata case, who gets away with everything through suicide.
Memetic Mutation: Fishing line. German fans comment that most of the crimes were done with fishing lines or similar cords.
Fishers need firearm licenses.
No fishing line, no crime.
Mis-blamed: No, sorry, it wasn't Funimation or Viz Media that changed it to "Case Closed". That change was actually requested by the Japanese editors to avoid copyright infringements/confusions with another Market-Based title: Conan the Barbarian.
Ship Mates: If you support the same format, then Shinichi/Ran, Heiji/Kazuha, and Kaito/Aoko is for you. To get Haibara out of the way, pair her up with Mitsuhiko. You might also include non-related ships like Eri/Kogoro and Satou/Takagi along with Shiratori/Kobayashi and Genta/Ayumi.
Ship-to-Ship Combat: Not in the English fandom, but Chinese fansite forums have very specifically banned threads comparing Shinichi/Ran and Conan/Ai.
One English-language forum keeps the Shinichi/Ran and Conan/Ai shippers to their own separate threads. Sometimes, you can't even discuss the Ran or Ai as stand-alone characters without the thread dissolving into a shipper war when either character's relationship with Shinichi is brought into the discussion.
Sympathetic Sue: Ai was frequently accused to be this, coming from Ran/Shinichi rabid shippers.
Values Dissonance: Western people without insight on Japanese culture tend to view Kogoro and Heizo as simple and shallow child abusers due to their harsh treatment of Conan and Heiji. However, a smack to the head does not get the same reaction in Japanese culture as it would in American — and partially Played for Laughs with the cranial eruptions, especially in early stories and the anime originals, compared to the later manga and manga adaptations. Additionally, Heizo's one punch of Heiji is used to discourage Heiji from going after a dangerous mob boss, and then uses the fact that Heiji's primary reaction is to get mad for the dismissal of his detective skills and continue investigating as a distraction to get the police force in place to catch the whole gang.
Actually, it's probably a little more worth it to point out that Kogoro is alcoholic. And it's not alwaysPlayed for Laughs.
Villain Decay: Inverted by Gin to an extreme. Gin gets progressively more evil and intelligent the longer the series goes on.
What an Idiot: In the 15th Non-Serial Movie, Quarter of Silence, the culprit develops an elaborate scheme involving blowing up a train in Tokyo as a diversion, then blowing up a dam in order to drain the lake behind it and get at stolen treasure that was buried there before the dam went up. He could have kept things much quieter and simpler, and completely avoided getting Conan and company involved, if he'd just used scuba gear instead. What an idiot.
There are times where Ran figures out that Conan is Shinichi. Since he's not telling her about it, she should have just keep this to herself until the right moment he tells her, but no; instead she keeps on admitting it to his face and tries to get a confession out of him, leading to the times where she'll forget about it. What an idiot she is.
Give Ran some credit. She definitely has had moments where she had Conan in a corner, only for someone or something to rescue Shinichi from having to confess who he is. She frequently catches Conan by tricking him into mentioning information that only Shinichi would know or getting him to respond to his real name. If it wasn't for the fact that the plot needs Ran to stay out of the loop, she would have known the truth very early on. It's not her fault that things just happen to intervene in the nick of time.
Though it's speculated that Ran does this to convince herself that Conan and Shinichi aren't the same person, as she subconsciously doesn't want to admit the possibility that the guy she loves has been right there all the time. That, and Status Quo Is God.
What Does She See in Him?: In one case, a man tries to kill his bride at a wedding. She notices his intention, but three years later, she marries him anyway..
Granted the marriage ends up happening after many revelations, a My God, What Have I Done? from the groom, the man serving time in jail for the attempted murder, and presumably a reconciliation in which the man and the woman come clean to each other about everything.
Woobie: Shinichi-Conan, Ran and Ai can be woobies at some point (certainly the OPs and EDs delight in depicting Ran as being all sad and torn up because she's been kept from Shinichi for so long).
Woolseyism: In Billionaire Birthday Blues, when the first victim is found leaning over the fountain he was drowned in, Kogoro says "Hey, this is no place to be sleeping". In the English Dub, Richard wonders if he's feeling sick, which (To westerners at least; unless Japanese people are able to fall asleep with their heads hanging over something like that in the rain) looks more like he's vomiting into the fountain at a glance.
This is also something that would have been Lost in Translation otherwise, but there's a part in which a fashion designer is surprised when she finds out that Ran's father is Kogoro Mouri. You'd think that before asking her presence and planning to help use her as an alibi, she'd make sure that she's not related to a local celebrity with the same surname, right? The dub makes this a little more recognizable to English speakers because they wouldn't know that "Mouri" isn't exactly an uncommon surname in Japan, but they would know that "Moore" is a really common name so someone with the same last name as someone famous could be unrelated period. Then again though, this could be simple assumption...Would you assume Ran to be related to some famous person with the same surname by looking at her and then looking at Kogoro?
A bit of a minor wallbanger in the Stalker episode. (#73/71 dubbed) The part about the shy woman possibly getting a lighter sentence since the stalker was planning to kill her isn't mentioned. Yes, we can all presume it won't be a plain by-the-book court case, but still, the omission of any dialogue leaves you with the bizarre impression that she got like a 20 year sentence for defending herself.
Conan via Moore did say perceived threat is at most a mitigating factor.
In the June Bride case; the bride is chastised for drinking lemon tea in the sub because "it was for kids" and it was localized as "Lemon Punch" in the dub. This actually makes a lot more sense in the dub; where she is instead chastised for drinking punch, also being told that it will rot her teeth. In the western world, tea is usually marketed towards teens and adults, whereas punch is usually marketed towards kids. Not to mention, punch is always very sugary, and "it'll rot your teeth" is something a lot of adults (and dentists) say to get kids off of drinking sugary drinks.