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.
Works in this franchise with their own YMMV pages:
Alternate Character Interpretation: The Predator species is subjected to a large amount of this due to the fact there is little information on them. Are they thrill seeking beings hunting for honor or are they a bunch of evil assholes who hunt humans for giggles?
Awesome Music: Alan Silvestri's primal score in the first two films. Highlights include the main themes of both, "Something Else" and "Billy Stands Alone" from the first and "Dem Bones" and "Truly Dead" from the second.
Complete Monster: From the comic Bad Blood, we have the eponymous Bad Blood himself. Unlike most Predators, or Yautja, who value honor and the glory of the hunt, the Bad Blood is an Ax-CrazySerial Killer hunted by his own people as a psychotic criminal. After crash-landing on Earth, the Bad Blood kills, tortures, and cannibalizes an entire crew of other Predators before setting off on a killing spree of unsuspecting humans. The Bad Blood routinely makes his kills as gruesome and painful as possible, seeming to cheerfully acknowledge himself as a "sick, psychopathic bastard." While most Predators are no friend to humanity, the Bad Blood has the distinction of being a monster by both human and Yautja standards.
Evil Is Cool: Given its bizarre weapons and technology and the unique design from Stan Winston, the Predator inevitably fell to this.
Rooting for the Empire: Possibly invoked, as most of the humans are inefficient or weak in comparison to the Predator, especially in Predator 2 and Predators where most of the Predator's victims are unsympathetic drug lords, criminal scum, or heartless soldiers. The only time the viewer has any reason to root for the protagonist against the Predator in the former is when it starts attacking police officers. Taken Up to Eleven in Predators, where two Predators fight each other in the climax.
Award Snub: Losing the Visual Effects Oscar to Innerspace. (Although Innerspace had some amazingly impressive and innovative special effects, including some from the guys who went on to make Photoshop.)
Ensemble Darkhorse: Blain (rocks a moustache, declares himself "a goddamn sexual Tyrannosaurus") and Mac (Scary Black Man, wigs outs after the Predator toys with them too much).
First Installment Wins: While the sequels have their fans, the original Predator is by far the most well known and revered film in the franchise.
Hell Is That Noise: Many of the sounds the Predator makes, which include its distinctive chirp and the cackle it makes at the end of the first film. The sound the Predator's Vision makes and its hearing, which crosses over into Uncanny Valley when it listens to humans.
Of course, any movie with Arnie and Jesse Ventura is funnier because of their subsequent political careers, but lesser known is that Sonny Landham (Billy) also tried to run for Kentucky Governor and Senator. For more context on Landham, since he isn't nearly as well-known as his co-stars, he was rejected for being too much of a right-wing nut by the Libertarian Party — meaning that, however dimly you might think of Ventura or Schwarzenegger, neither of them can fairly be called the worst gubernatorial candidate in the cast ofPredator. Carl Weathers later mocked this with a spoof campaign commercial: "Vote for me. I was in Predator!"
Jesse Ventura (Blain) spends the first movie wearing a MTV t-shirt under his combat gear. While MTV still had some rebel cred in 1987, the sight of a hulking badass wearing the shirt of a network now mostly known for Tween reality shows is hysterical.
A smaller example: After KONY 2012 came out, Trolls on Facebook and the like started posting pictures of Dillon who — with his mustache and army outfit in Predator — looked a bit like Ugandan warlord Joseph Kony at a brief glance, at least to the ill-informed who didn't know the actor. Most said nothing but variations of "This guy's awesome", to see how many people they could rile up. It worked.
Seinfeld Is Unfunny: While still a great action movie, some elements of Predator are hardly unique now that they have been imitated several times.
Handheld miniguns are hardly revolutionary now that several action movies have imitated or parodied them.
On a similar note, visible invisibility isn't as exciting now that works like Halo have imitated it.
Back in its time, the film itself was considered shocking as it broke the action movie mold by having Arnie and his friends defeated by a stealthy being that used its brain and deception to defeat them. Nowadays, it's common practice for action movies such as Die Hard have their protagonists rely on their brains instead of heavy firepower and shooting stuff.
As Mac affectionately lays a whiskey flask on Blaine's body to Alan Silvestri's mournful yet warm and gentle trumpets:
Mac: Goodbye, bro.
Later that night, Mac is on guard and looking at the stars whilst going over Vietnam memories with Blaine. Throughout this sequence, he's chewing tobacco — tobacco that everyone refused when Blain offered it to them in the helicopter.
Uncanny Valley: Several unusual audio examples, from the creepy distortions the Predator hears when the men speak to its bizarrely human laugh at the end.
Vindicated by History: While a hit with audiences, Predator was not well received by critics at the time (although Roger Ebert gave it a positive review) and its Metacritic and Rotten Tomatoes scores reflected this. In more recent times, critical attitudes have warmed and it has even gone on to be featured on several "best of" lists. (It's also picked up a reputation as one of the manliest movies ever.)
One reason given for its rather impressive comeback is that films like this simply aren't made very much any more; big macho near-invincible action stars with massive guns and simple practical special effects gave way to more relatable heroes and wall-to-wall CGI. People are getting increasingly bored with what they've got and are looking to the past for entertainment.