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: Men In Black
From the films:
Acceptable Targets: The wife-beating redneck who gets bugified at the start of the first film. Obviously didn't want any worrying about what happens to someone who gets eaten by a space cockroach.
Adaptation Displacement: It was originally an indie comic book. One that didn't focus exclusively on aliens, either. Originally, the MiB's job was to snuff anything too weird for the American public. The first issue was all about a New Mexico death cult, for example.
Additionally, MIB was not nearly as benevolent in the comics. Instead of having a neuralyzer, agents would outright murder a witness to cover-up or complete a mission, as well as executing and torturing innocent aliens. The organization also had an ulterior agenda that involved manipulating Earth as opposed to simply protecting it.
Alternate Character Interpretation: The tests Jay participated in to qualify for MIB. Were Zed and Kay giving the candidates a Secret Test of Character that Jay passed by thinking differently and deviating from what they expected, or were they straight tests and Jay passed due to his impressive physical showing against the alien earlier in the film that Kay was impressed by?
Big Lipped Alligator Moment: Zed's gravity-defying bicycle kick in the second film. Not only is it not explained how he can do this, but it's also pointless (he's gets KOed immediately after).
Complete Monster: Boris the Animal in Men in Black 3 is by far the most murderous and sadistic villain to appear in the movies. He is introduced being freed from prison by his girlfriend, whom he leaves to die when she is blown out into space, as well as another prisoner whom he promised to take with him. He travels back in time to eliminate K as personal revenge for destroying his arm when he was captured, causing a present day invasion by his race of Planet Looting Boglodites to consume everyone on Earth. He kills a number of targets in the past, only refrains from killing his past self because he would be erased from time, and at the end murders J's father out of spite for being thwarted by K.
Any movie set in New York before 2001 is sure to feature the World Trade Center in skyline shots.
In the first movie, it was revealed that Elvis had not actually died, but was an alien who "went home." In the second movie, Michael Jackson had a cameo as an alien. Since then, Michael Jackson died in a manner strikingly similar to Elvis's death. (Or did he just go home?)
Genius Bonus: The first film included a "practical joke by the Great Attractor" — Great Attractor being the name for a strange gravitational anomaly with an apparent mass equal to tens of thousands of Milky Way galaxies.
Agent W is undercover as Andy Warhol. He begs to be reassigned and K says he'll see what he can do. We never find out if he was ever let go, but Andy Warhol didn't die until 1987, 18 years later.
J: I ain't playing with you, K. Did you ever flashy-thing me?
Though it could have referring to the fact that J had been memory wiped earlier in the movie, we later find out that yes, K did wipe J's memory when he was little after his father was killed in Men in Black 3.
Not to mention the entire dynamic between K and J in the previous two movies has to be re-imagined thanks to the revelation in 3 that K feels extreme guilt over getting J's father killed.
This line also becomes much harsher:
K: I've just gone down the gullet of an interstellar cockroach. That's one of a hundred memories I don't want.
Heartwarming In Hindsight: The reason why K so quickly recruits J into the MIB as well as acting like a surrogate father makes more sense when it's revealed that K pretty much does consider himself J's surrogate father to make up for accidentally getting J's real father killed.
Hilarious in Hindsight: Will Smith was originally slated to play Neo in the Matrix trilogy. In that movie, he would have fought Agent Smith, a villain who greatly resembles an MIB agent. Similarly, J poking fun at another MIB candidate by calling him 'Captain America' means something different after Will was briefly linked to the role. Not to mention Tommy Lee Jones being in the film.
Speaking of Captain America, six years after this movie, Marvel Comics character Isaiah Bradley, an African-American who went by that alias, was introduced.
The first film (released in 1997) includes a scene where K talks about a "fascinating little gadget" confiscated from aliens that's "going to replace CDs soon". To anyone watching the movie after 2001, he sounds like a time traveler describing the iPod to someone in The Nineties.
For added irony, K also offhandedly remarks that "I'll have to buy The White Album again". In the early years of iTunes, the store's failure to carry music by The Beatles was one of the biggest complaints against it.
The device itself was a Sony MiniDisc player, one of the company's many failed attempts to get past the CD era.
In a blink-and-you'll-miss-it line from the first film, K is about to say "I guess you weren't even alive in 1968" before the Bug almost eats him. The third film shows he clearly knew this isn't the case.
In the first film, J is very worried about the effects of multiple neuralyzations. In the second film, he neuralyzes a group of New Yorkers in the subway twice in the same scene.
Smith's "Men in Black" tie-in song is based on a sample from Patrice Rushen's "Forget Me Nots." Ironic choice for a film centered around Laser-Guided Amnesia.
Lenny Vinito(The Bowling-Ball Head Alien) went on to play the human among the aliens on ABC's The Neighbors.
Other-world O testing J for who knows what with a slap in the face, then realizing "dammit it's not the tick". Which actorfrom which show spent a couple of scenes in the previous movie before being retired?
He also mentions in one ocassion that K is all he has in the future.
I Am Not Shazam: The Bug Alien's name is NOT "Edgar". Edgar is the name of the farmer the Bug Alien kills and disguises himself as in the first movie. The animated series seems to forget this. Even his action figure is called Edgar. In the first movie, J calls it "the bug in the Edgar suit". Though they probably just call him that to differentiate him from his identical brothers in the animated series, like Edwin.
Inferred Holocaust: Averted but lampshaded. After they have Laura, the Light of Zartha, leave the planet and destroyed her pursuer, K tells J to leave and head back to headquarters. J then points out that a great deal of people had witnessed what had happened with the implied possibility of having to a long night of neuralyzing all of New York before they can go back to HQ. K then puts on his sunglasses and non-verbally tells J to put on his sunglasses, and then activates a giant neuralyzer located within the Statue of Liberty's torch.
One-Scene Wonder: Jeebs, Frank the Pug and the Worms in the first movie (though they show up briefly in three different scenes). Positive response led to them all returning for the animated series and the sequel.
Andy Warhola.k.a. Agent W steals the show in the third movie.
Sequelitis: Men in Black II is widely viewed as a disappointment, though it was a box-office hit.
Surprisingly Improved Sequel: Men in Black 3 is much, much better received than Men in Black II, though most feel the first one is still the best.
In MIBł, we never really get to see Boris kicking ass in his original alien form.
Boris is fairly underused in the movie in general.
Agent Elle, played by Linda Fiorentino, never came back in the sequels. Her absence is explained by J claiming she wanted to go back to work at the morgue, and thus was neuralyzed by him. (Of course, when writing Elle, nobody had any idea that Fiorentino would be exceedingly hard to work with, thus necessitating her departure.) Still,that hasn't stopped fanfic writers from doing stories where she returns to MIB and becomes an agent once again.
In the sequel, J takes a neuralyzed K under his wing to try and stop a threat only K knew how to deal with, and the rest of MiB is compromised from the inside. Hotshot rookie J is now the jaded veteran, and K is the over-his-head smartass! ... for about thirty minutes.