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: Superman Returns
Alternative Character Interpretation: The creators of the film appear to have had it in mind that Superman was to be a Christian Allegory or at-least an all-around boy-scout. This is kind-of undermined by how he turns out to be the father of Lois' child meaning he either slept with her without her knowing he was Clark, or Jason was conceived in Superman II and he impregnated her during the night they spent together which he erased from her memory—along with everything else—at the end of the film.
He also decides at one point to eavesdrop on Lois and her family one night after using his super hearing to listen in when she tells the cab driver where to take her. Class act.
Anvilicious: In the Christopher Reeve films Jor-El talking to Superman already sounded like God talking to Jesus ("I have sent them you, my only son", etc.), but this film takes that parallel and runs with it. Besides reusing that version of Jor-El, Superman's return is a "Second Coming", he suffers a "Passion" when Lex and his men beat him up and Lex stabs him in the side, after saving the day he falls to Earth near death in a cruciform position, and he unexpectedly recovers from supposedly fatal injuries, with his empty hospital bed evoking the empty tomb. And as at least one critic (of Time magazine) pointed out, Superman secretly having a child with Lois is sort of like Jesus secretly having a child with Mary Magdalene.
Broken Base: The fanbase was (and remains) divided over this movie. While numerous fans saw Returns as a sincere ode to the earlier films, others were dismayed that the film didn't use any material from the comics and completely changed the dynamic of Lois and Superman's relationship. While the film received some good reviews, the overall polarizing reception and underwhelming box office caused plans for a sequel to fizzle out, despite director Bryan Singer promising a more action packed follow up.
Ho Yay: Jimmy Olsen seems to be just a wee bit too fond of Clark Kent.
It's the Same, so It Sucks: A common criticism of the film is that its plot is far too similar to the original Superman (Superman tries to save Metropolis when Lex Luthor and his feisty female assistant try to kill Superman with kryptonite and make money with a real estate scam involving natural disasters).
Running the Asylum: Singer is, by some accounts, a huge Superman fan (or at least a huge fan of the first two Christopher Reeve Superman films), which is why he left the X-Men franchise to make a Superman movie. Some of those accounts suggest that this is why the first two X-Men movies were awesome and Superman was not; he was only marginally familiar with the X-Men comics, so he was able to make two X-Men films that even non-fans could enjoy, but he was too close to Superman to do it right.
According to Singer himself this is why, as a Star Trek fan, he has never approached the Star Trek franchise beyond his one cameo in Nemesis for fear that he would be "too close" to its mythos to do it right.
Sequelitis: A variation; one of the often-raised criticisms of the movie was that the makers didn't seem able to make up their minds whether they were carrying on from the end of Superman II or whether they were making their own distinct film.
Unfortunate Implications: As pointed out by Kevin Smith, since Lois has no idea she's had sex with Superman and conceived his child, this implies that the memory erasing kiss in Superman II occurred. So in the hospital, instead of telling him that he has a son, why wasn't she freaking out that he might have raped her? From her point of view she's just realised she has no memory of being impregnated by an alien god, who immediately afterwards skipped town for five years. Doesn't that seem slightly suspicious?
Visual Effects of Awesome: The film had a budget of $250 Million and every cent can be seen on the screen. From the beautiful opening titles to Superman's incredible rescue of a jet to Superman having a bullet bounce harmlessly off his eye, every scene shines with a quality that shows how much Singer cared. Special mention must go to the scene where Superman lifts an island with shards of Kryptonite mere millimetres from his face. The effects are unanimously stunning. Which only makes the shoestring budget of Superman IV all the more hilarious in comparison.
What an Idiot: Thom Holbrook wrote an essay pointing out that Superman is dumber than a bag of hammers in Returns.
The big inspiration for Superman Returns is when Superman and Lois had sex, what if he got her pregnant? Thus the need for him to be gone five years so that he could return to discover he has a son. That also means that, clearly, Superman left before he knew Lois was pregnant, we can assume he left shortly after Superman II. Really shortly. He's Superman. He would be able to see Lois was pregnant very early on with his vision. Lets say he leaves… two months after the end of Superman II. So in Superman II he painfully learns that he must put the needs of Earth ahead of his own personal desires. He apologizes to the President for being away so long (we was gone maybe a week or two) and that he won't let him down again. Then two months later he leaves Earth without telling anyone on a personal five year long wild goose chase. He also leaves without covering his bases. He doesn't secure the dangerous tech in his Fortress of Solitude. He doesn't make sure his departure won't result in Lex Luthor's release from jail. He doesn't even apparently warn the President he's leaving. His actions fly in the face of everything he learned in Superman II and everything he swore to do. Dumb as a bag of hammers.
Kate Bosworth also received some of this when cast as Lois. Numerous commentators seemed to be of the opinion that she and Parker Posey should have swapped roles, not least because Posey had a closer resemblance to Margot Kidder, the Lois Lane of the previous film sequence. The fact that Kate Bosworth is thought to be too young as Lois (23 opposed to Posey's 37) helps.