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: Return of the Jedi
Alas, Poor Scrappy: The scene where one of the Ewoks tries to get another Ewok to wake up before realizing that he in fact died.
Asspull: Yoda's mention of "The Other" in Empire was just a means of removing Luke's Plot Armor before sending him off to his duel with Vader. Lucas had a vague idea of what the character was and what they would do but that was for later in the series. Then Empire's production was so stressful that Lucas decided to make Jedi the final film. With only one film to wrap up the story Lucas decided Leia would be The Other because she was the most convenient choice in the cast.
Awesome Music: "If you will not turn to the dark side, then perhaps she will!" Cue Luke going berserk, and the music going right along with him.
Badass Decay: Boba Fett. Although strictly speaking he didn't do anything particularly badass in the previous movie, he at least looked cool and imposing. In this one, he's defeated fairly easily (by a blind man, no less) and in the Special Edition he does what might be seen as flirting with some strippers, which annoyed some fans greatly for ruining his mystique.
Big Lipped Alligator Moment: The band sequence in the special edition, which was really just an extension of the original sequence that was trimmed down to just the part where Jabba threw Oola into the Rancor pen (30 seconds vs about 2 minutes). In the Making Of featurette that preceded the movie, Lucas admitted that he just thought it would be funny to have a random musical number in an otherwise serious movie.
The non-canon novelization has its version of Moff Jerjerrod. Portrayed as an arrogant, self-important Sociopathic Soldier who joined the military for the violence, Jerjerrod saw the Rebel Alliance as something smaller and weaker than himself that he could bully with impunity. As commanding officer of the second Death Star, Jerjerrod was an enthusiastic participant in Emperor Palpatine's plan to exterminate the Rebels, viewing it as an exercise in total annihilation; his one regret was that the end of the Rebellion would mean the end of the war he loved. When the Emperor and Darth Vader were slain, Jerjerrod, enraged at the Rebels for fighting back, ordered Death Star II to obliterate Endor, intending to butcher not only the Rebels and the Ewoks, but his own men, and every other sentient lifeform on the moon, out of a desire "to incinerate something green and living, gratuitously, meanly, toward no end but that of wanton destruction. A small act, but deliciously satisfying." A petty, sadistic man with a big gun, Jerjerrod was among the cruelest and most vindictive officers the Imperial Navy had to offer.
Fountain of Memes: The Emperor. The deliciously evil delivery of his hate filled lines makes him extremely quotable.
Admiral Ackbar thanks to his hammy lines like "It's a trap!" and "Our cruisers can't repel firepower of that magnitude!".
"Funny Aneurysm" Moment: An Expanded Universe version. Remember that little bit in the Special Edition, where a mob on Coruscant is toppling a statue of Emperor Palpatine? Well, in the novel Iron Fist, it's revealed that immediately afterward, a massive number of stormtroopers entered that plaza to "restore order"...by opening up on the crowd on full-auto. No, their blasters weren't set for stun, why do you ask?
He's Just Hiding: For a guy who pretty much was eaten by the Rancor, Jubnuk the Gammorrean was heavily speculated to have actually survived, which also caused some edit wars on Wookieepedia. The fact that the popup book Jabba's Palace shows Jubnuk being cut out alive and well from the Rancor's carcass does not help matters, either.
Hilarious in Hindsight: In MAD's parody of this film, Lando derides the planned assault on the second Death Star as a "Mickey Mouse Operation," and even depicted Mickey himself as Lando's copilot. Cue October 2012 and the franchise is now in Disney's hands.
It Was His Sled: Leia is Luke's sister. Yoda gives the confirmation of the It Was His Sled from The Empire Strikes Back when he tells Luke (and the audience) that Vader is indeed Luke's father as he claimed.
Magnificent Bastard: Palpatine not only managed to corrupt Vader, he almost succeeded with Luke and set up a pretty nifty trap for the Rebels to fall into.
Misaimed Fandom: This isn't really the case with viewers as whole, but believe-it-or-not, there is a single instance where this happened to Emperor Palpatine, and by a public figure, no less. The Emperor was actually viewed as something of a personal role model by Real LifeSerial Killer Jeffrey Dahmer because of the sheer power he was able to wield over others via his Force Lightning. Dahmer also admired the Gemini Killer from The Exorcist III movie for silmilar reasons.
The Scrappy: The Ewoks were obviously an attempt to introduce "cute" aliens into the film, but many older fans ended up hating them or at least finding them annoying for their ridiculous Rock Beats Laser victory. Their "cuteness" is supposed to be offset by the fact that they have no problem eating sentients (they WERE going to eat the heroes after all), but that gets lost in the shuffle when people remember them.
Their Scrappy status gets even worse when a later interview has Lucas stating that he based the Ewoks on the Viet Cong.
Special Effects Failure: The Max Rebo band in both versions, especially with Sy Snoodles. In the original, she was a very static puppet. In the SE, she became a more detailed and mobile (albeit cartoonish) CG model that didn't blend properly.
Take That, Scrappy!: Not in the film itself, but the 2012 guidebook The Essential Guide to Warfare has a section about the Battle of Endor from an Imperial soldier's perspective, and the way he described the Ewoks and their actions during the battle reeked of Nightmare Fuel, almost painting them as being similar to a bunch of Sociopathic Soldiers.
Theiss Titillation Theory: Was there any more to Leia's slave girl costume beneath the panels of cloth hanging from front and back of the waistline? According to Carrie Fisher on the commentary, there wasn't, and at times, the cast and crew standing behind her could see "all the way to Florida", as it were. Oola suffers a wardrobe malfunction as she is being dragged towards Jabba the Hutt, and again as she falls through the trap door. You can still see a short bit of the first malfunction in the current special edition. Older editions have longer scenes.
Ugly Cute: Anakin's face under the Darth Vader mask is horrifically scarred, but looks like a kindly old man otherwise.
Unfortunate Implications: In an interview later on, George Lucas insinuated that the Ewoks were supposed to be based on the Viet Cong (aka, the Communist-backed guerrilla group within South Vietnam during the Vietnam War), which causes a lot of negative implications about Lucas' views on America when the Ewoks were fighting and basically slaughtering the Imperial Stormtrooper, although his viewpoint was beyond geopolitical since he saw the US confrontation in Vietnam as ultimately as the triumph of the human spirit overcoming a technologically superior opponent.
Vindicated by History: After the near-universal backlash against Jar-Jar Binks in the Prequel Trilogy, many fans have looked more favorably upon the Ewoks.
The Rancor keeper crying over his dead pet. And the Rancor itself, once you know it's backstory and the fact that Rancor are naturally a relatively peaceful species. They are essentially the pitbulls of the Star Wars universe: gentle animals that can, by cruel treatment, be turned into vicious monsters. This one here acts the way it does because Jabba doesn't feed it very much, hence why it eats everything thrown into the pit, it's horribly underfed, and he also made it fight other dangerous creatures as big as it was. The animal keeper was planning to escape with it because Jabba was planning to pit it against something bigger than it was, but then Luke showed up...