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.
Alternate Character Interpretation: A great deal of Aunt May's scenes (particularly the scene in Spider-Man 2 where she tells Peter why Spider-Man is important to the city and the scene in Spider-Man 3 where she acts shocked that Spider-Man killed Sandman) led fans to believe she's a Secret Secret Keeper who knows Peter is Spider-Man. Nothing in the series or Word of God confirms it, but it fits really well.
Did Norman tells Peter not to tell Harry he was the Green Goblin because he didn't want Harry to know his secret...or because he wants Harry to take up his role as Spider-Man's enemy ignorant of who actually killed Norman? If so...was Harry seeing his ghost?
Crowning Music of Awesome: Say what you want about the movies, there's no denying Danny Elfman's memorable addition to their soundtracks. Special mention goes to the main theme  and "Costume Montage/Web Practice"  among others.
Mary Jane Watson. Three movies. Three times kidnapped to be used as bait to lure Spidey out. Yawn. It's particularly egregious in the first movie; Spidey rescued her three times in it alone.
Lampshaded in the third movie novelization by Mary Jane who asks if she has bait stamped across her forehead when she's locked in Venom's falling car. Also in the third movie, MJ does become a Heroic Bystander and drops a block of cement on Venom's head as he fights with Spider-Man, and to her credit, she tries to attack Doc Ock from behind in the second film — but Aunt May had already successfully done the same thing earlier on, and Doc Ock doesn't repeat his mistakes.
Interestingly enough, Gwen Stacy was originally going to be the one abducted for the final battle in the third film, not Mary Jane, and Mary Jane would have been the one who helped Harry come to his senses. A line from this was included in the trailer: "We've all done terrible things to each other, but we have to learn to forgive each other or else everything we ever were will have meant nothing."
If you listen to the DVD commentary, you can hear the irritation in Sam Raimi's voice while he recalls having to A) put MJ back in the damsel role because of time constraints and B) having to apologize profusely to Kirsten Dunst after he promised her before the filming of the movie that she wouldn't be doing that again.
A number of people were rooting for an Ursula/Peter romance. Arguably, other than Aunt May, she's the only female in the second movie who loves Peter for being Peter.
Thomas Haden Church plays the Sandman to utter perfection in the third film. In fact, of the entire series' rogues gallery, Church's Sandman looks the closest (read: EXACTLY) like his comic book counterpart.
Evil Is Cool: Played with to the point of parody or deconstruction in the third movie. Once Peter's bonded with the Venom symbiote, his moral restraint plummets, his feelings of aggression and confidence shoot through the roof and he adopts a dark, callous attitude and black leather wardrobe to match. However, since Peter is still, at heart, a lovable geek with no real idea what "cool" is, his new attitude's actually a goofily overdone caricature that draws eye-rolling disbelief from the people around him.
Willem Dafoe as Osborn/Goblin is a straight example, he's Creepy Awesome and more entertaining than the other villains.
Also in the third, when Peter pulls off his dark suit in the church. At one point, his arms are up and out from his sides, crucifix style. Complete with the church bells ringing. And Eddie praying to kill Spider-Man below. Yeah...
Not to mention the shower afterwards. Recognition of sin, repentance, and baptism, perhaps?
And Spidey sure mustnīt have noticed that big, flaming US flag when he chose to make his comeback...
Foe Yay: Spidey and the Green Goblin in the first film, though only on Gobby's end of things.
Fridge Brilliance: The genetically-engineered spider was created by combining the DNA responsible for the attributes of 3 species of Spider. We see a graphic that the strands overwrite the Host DNA of the species it was implanted in. Because Peter's DNA is Human, thats why the mutation only causes him to develop the abilities, and not turn into a Seth Brundel abomination.
Ham and Cheese: With a stupid-looking, limiting costume, the best thing Willem Dafoe could possibly do as the Green Goblin is go completely over the top. It worked.
And now with Dying Wish, specifically its conclusion in The Amazing Spider-Man #700, Peter Parker dies remembered as that monster (as everyone believed him to be Doctor Octopus due to a "Freaky Friday" Flip), while Otto Octavius gets to take on the identity of both Peter Parker and Spider-Man..
Throughout the third film, Peter tries to propose to Mary Jane but things never work out and he ultimately never goes through with it. The infamous One More Day storyline came out only a few months after that.
The second movie features Mary Jane getting engaged to J.J. Jameson's son, only to go back to Peter in the end. A few years later, we got Superman Returns, in which Lois Lane gets engaged to Perry White's nephew, much to the consternation of many fans.
"I'll always be Spider-man" became this around 2011 when the reboot was announced and Andrew Garfield took over.
Narm: The third film is pretty infamous for its weird tone, but special mention goes to Peter Parker's infamous dancing. Sure, it's intenionally played as comedic, but his reasons for doing this are meant to be seen as a serious dick move on his part, but it's sort of hard to focus on that when the dancing is so silly.
Hearing Topher Grace's voice in his Venom form.
The second film had Doc Ock's artificially intelligent arms "talking" to him.
From the original film: "It's you who's out, Gobby! Out of your mind!" Kirsten Dunst even had a laugh at this one in the DVD commentary.
And let's not forget the Green Goblin is one of the most ridiculous looking villains in movie history. He looks like◊ a refugee from a Power Rangers episode. It's easy to see why they thought the comic book version◊ wouldn't have worked in live action, but they replaced it with something even more stupid. To Quote Total Film magazine (I think) "This guy looks more like an action figure than his actual action figures!"
Arguably, the people being skeletonized by the pumpkin bombs is a little too cartoonish to be scary. It gets even worse when you realize that these same bombs keep having different effects on different people, with no consistency whatsoever.
Toward the end of 2, when Peter sees a big-ass wall about to collapse on MJ from behind, he lets out a wail that is not only really over the top, but comes with a close-up of his face as he makes it, and to make it even more Narmful his voice cracks more than once in the (rather long) non-Big "NO!"Big "NO!".
It's not even a no, that's the best part. It's some awful, ungodly roaring noise that escaped from the fires of hell and out of Tobey Maguire's mouth. take a look.
Green Goblin's death in the first film: impaled on his own weapon, the look of agony, the groaning... But look at where the glider hit him.
Never Live It Down: The first thing that anyone who hates Spider-Man 3 will mention is the dance scene, which only lasted for a couple of minutes out of the movie.
Older Than They Think: The plots of 1, 2 and 3 mirror Superman, Superman II and both Superman III & IV. Part 1: Origin story. Part 2: "Don't want to be the hero". Part 3: Good hero and evil hero.
Many people also complain about Peter being too depressive and cracking not enough jokes. This is actually very faithful to the early source material (the 60s/70s). Pete isn't the Page Image for Classical Anti-Hero for nothing. Him becoming a Deadpan Snarker was later.
The tie-in for the first film was regarded as a generally decent action game, brought down by an awful camera system and an overly short length.
Thoroughly averted by the console version of Spider-Man 2, which is widely regarded as one of the best tie-in games of all time. Played straight by the PC version, which is a completely different game with much worse web-slinging mechanics and the recreation of Manhattan busted down to just five smallish zones (and sadly, it says everything about licensed games that it isn't regarded as being anywhere near one of the worst ones ever).
The Spider-Man 3 game is a borderline case. Few thought it was bad by any means, but it was widely considered to be a major disappointment, especially considering it was released on a new console generation.
Romantic Plot Tumor: A common criticism of the movies that they devote too much time to the love story, to the detriment of action.
The third film receives the most criticism on this count, since many fans felt that the second film was a fine conclusion to the romance. The fact that the film had three other major plotlines competing for screentime also caused problems. On the flip side, some thought the romance was better in the third film because it was more interesting to see Peter and MJ dealing with problems as a couple, rather than the first two's "will they or won't they?" drama that everyone knew the answer to.
Special Effect Failure: As awesome as the effects generally are in the first film, there were a handful of instances where the effects team used obvious short-cuts, most notably with the rather amorphous and undetailed CG model of Spidey used in some of the instances of him swinging through the city.
Uncle Ben dying in the first movie. Always a given with Spidey's origin, but this one comes with a twist: the last thing Peter said to him was a spiteful insult, only to then later watch him die.
The birth of Sandman in the third movie, is such a hauntingly beautiful and sad scene that it's hard to believe it is from the same film as Peter Parker's "Saturday Night Fever dance."
They Wasted a Perfectly Good Plot: When Peter confronts the thief who killed Uncle Ben, the thief ends up tripping on a pipe and falling out a window to his death. And there are police with spotlights watching the whole thing. Peter, in his Spider-Man costume, in his first public appearance as the crime-fighting hero, looks out the broken window and is seen by the police with the spotlight. And yet this is never mentioned again. No one—not even Jameson—tries to treat him as a murderous vigilante, and he never has to try and Clear My Name.
Visual Effects of Awesome: All the films have excellent effects but the aforementioned birth of Sandman deserves a special mention. The effects (which took six months to do and the effort shows) are so good, you can actually see the emotion in Marko's eyes while he is in sandform. From despair to heartbreaking sadness and absolute determination. Say what you will about the rest of the film, but damn that was a brilliant scene.
Why exactly did Peter think it would be a smart idea to plant a big wet one on Gwen Stacy right in front of Mary Jane in Spider-Man 3, in the exact same way as he first kissed Mary Jane in the first film no less?
What on Earth possessed Harry's butler to not tell him he knew Norman had been killed by his own gliderbefore Harry decided to dedicate his life to vengeance against Spider-Man?
Word of God states that the butler, while a real person, was a hallucination in that scene, representing Harry's conscience....Yeah.
There's also Mary Jane going along with Harry's blackmail instead of just telling Peter (her very powerful superhero boyfriend) about Harry's amnesia recovery, especially considering that Harry was watching from a distance at the same place at the time!
Surprisingly, this was the initial reaction when Tobey Maguire was cast as Spider-Man himself, as fans thought he was too "doughy" for the role (which he was at first, but months of long, hard training can change a man).
Wangst: Both Peter himself and Mary Jane starts to fall into this territory by the time of the third movie. Also, Harry often makes rants about how much he wants to get revenge on Spider-Man for "killing" his father, though he's generally more proactive in doing something about it.
The Woobie: Sandman. The guy just want to get his daughter cured, and he don't want to hurt anybody else in the way, but things just never worked out for him. He sums it up well with "I'm not a bad guy...I've just had really bad luck." And by the way, just to get a picture of how rough things are for this guy? He says this line BEFORE he becomes the Sandman.
Peter himself is an obvious example. MJ and Harry also have their moments of Woobie-ness, particularly in Spider-Man 3.