The Kingpin for a time became better known as a Spider-Man villain, which is fitting since he made his first appearance in The Amazing Spider-Man #50 and was chiefly a Spider-Man villain before being associated with the Daredevil franchise.
Captain America's Leitmotif. Especially when he confronts the Red Skull.
Badass Decay: Several villains. The Lizard in particular gets this bad past his initial appearance.
Broken Aesop: Great power may demand great responsibility, but the extent to which the story takes it at times is ridiculous. Case in point, in the second season of the 90's animated series, when Peter's body begins to mutate, fellow student Michael Morbius steals a sample of Peter's blood from his locker, believing that Peter is trying to one-up him for the post of Dr. Curt Connor's assistant, which ultimately transforms him into Morbius the living vampire. Despite the fact that his becoming a monster was the result of Morbius' own morally objectionable behavior, Peter is depicted as being at fault for leaving his blood sample for Morbius to find.
The quality of episodes after the first season. Some fans think that the show grew the beard after the first season with its story arcs, Character Development, and focus on Peter's personal life, while others think that the show declined in quality, citing bad animation, constantly recycled footage, the overuse of the Kingpin, Morbius or Madame Web and more space and vampire stories.
Christopher Daniel Barnes as Spider-Man. About half the fanbase thinks that he is the definitive voice for Spider-Man, as Kevin Conroy is the definitive voice for Batman. The other half thinks that Barnes was way too melodramatic as Spidey and his voice didn't fit Spidey at all.
Cletus Kasady, aka Carnage, is introduced as an Ax-Crazy lunatic willing to use a bomb to kill himself and everyone within a 200 meter radius just for giggles. After entering into the service of the Dimension Lord Dormammu and bonding with the offspring of Eddie Brock's symbiote, Kasady uses his newfound power and connections to become an even worse menace. Unlike Eddie who, when bonded with his symbiote, creates a combined persona called Venom, Cletus is so psychotic that he still remains completely aware and in control after bonding with his symbiote. First helping Venom steal an interdimensional probe, Kasady quickly displays contempt towards his "dad's" softness and proves himself willing to kill Venom on the flimsiest of pretexts. Kasady would later go on to steal the souls of numerous innocent people in order to summon Dormammu and herald The End of the World as We Know It. Once Spider-Man defeats him by letting him be sucked into Dormammu's home dimension, Kasady attempts to grab Eddie Brock's Love Interest, Dr. Ashley Kafka, to take her with him. He's only thwarted by Eddie sacrificing himself instead. Rampantly homicidal and needlessly sadistic, Kasady was a far cry from the usual Spider-Man villain, doing evil solely for thecarnageit unleashed on the world.
Herbert Landon is a Mad Scientist, the Evil Former Friend of Hank McCoy, and a genocidal Smug Snake driven solely by hatred. A rabid anti-mutant extremist, Landon created a formula that destroyed mutant cells and killed any mutant exposed to it. His endgame was to market this formula to the public as a cure for mutants only to instead use it to wipe them all out. The first person Landon attempted to test out this formula on is his "old friend," Hank. Thwarted in this endeavor, Landon would go on to become The Dragon to the Kingpin, and performed various unsavory deeds such as forcibly converting Alistair Smythe into a cyborg slave and testing out a Super SoldierSuper Serum by using Felicia Hardy as a guinea pig.
Creepy Awesome: Carnage, before and after his transformation, due to his sheer batshit insanity.
This show certainly played a large role in promoting Hobgoblin and Shocker into the limelight. The former being ironic, considering the producer outright hated the Hobgoblin and only included him because of decisions his predecessor made.
Daredevil's solo appearance takes the best bits from his backstory, and distills them into a concise, tightly-written two-parter. His honesty, good nature, sense of humor, and remaining idealistic despite the odds makes him a very likable character. Shame his spinoff series never went off the ground.
Fight Scene Failure: The show had a number of heavily castrated fight scenes due to heavy censorship refusing to let Spider-Man throw a punch when battling villains. Pretty much all of the fights are done with Spider-Man's webbing. Very rarely you'll see an actual punch in a Wham Episode, such as when the Green Goblin abducts Mary Jane and takes her to a bridge many comics fans recognized...
First Installment Wins: There are fans who see the first season of the show as the one with the most memorable and well-written episodes, like "The Night Of The Lizard" and "The Alien Costume Saga", and with the best animation in the entire series. The following seasons are more divisive.
Gateway Series: For many kids, this was their first exposure to Spider-Man and its mythos. While it certainly took some liberties with the comics, the results generally work well, all in all providing a good jumping off point for a fan.
The dissolution of Mary Jane's clone became more of a tearjerker after the release of One More Day, which retconned their marriage in Marvel comics.
An episode of a disfigured former actress plans to kidnap Mary Jane and use a device to transfer her mind into Mary Jane's young and beautiful body it doesn't work as Mysterio tells her that what she wanted was scientifically impossible. In Superior Spider-Man Doc Ock used this trick on Peter... and it worked.
In the first episode Spidey complains about why he has to crawl around sewers and can't land an easier superhero gig with the Avengers. He also complains about not being "a galaxy hopping superhero," which he essentially becomes in the final episodes.
Among the Spider-Men from alternate universes in the Secret Wars arc, there is one in particular that claims to have taken Doc Ock's Combat Tentacles after defeating him. Almost twenty years later, the Superior Spider-Man debuts.
Then there's pre-vampire Morbius, who looks and sounds kind of like Tommy Wiseau.
This show had the Kingpin being played by a black actor, long before the Daredevil film caused such an uproar by doing it.
Fans of the Black Cat/Spidey ship probably rejoiced when they saw, of all things, Cinderella III: A Twist in Time, which had Jennifer Hale (Black Cat/Felicia) as Cinderella and Christopher Daniel Barnes (Peter/Spider-Man) as the Prince, both of whom in that movie kick ass. (And it was released just two years prior to Disney's acquisition of Marvel for added irony (though technically they had owned this series since 2001- long story involving Freeform).)
Iron Woobie: The Scarlet Spider. He's been through all the same trauma that Spider-Carnage has, but somehow came out okay.
J.Jonah Jameson's distrust and dislike of Spidey make much more sense when we learn that his wife was killed by a masked gunman. Alistair Smythe arguably qualifies for this trope, along with Morbius.
The scene where Kingpin's wife leaves him is surprisingly sad and is the one time the Kingpin shows actual remorse for his actions.
Venom. Sure he went off the deep end in his first appearance, but it was motivated by the loss of his job, apartment, and reputation thanks to Peter's unintended actions as a reporter. In his second appearance, it's established he's cooled down quite a bit without the Symbiote. Even when he merges with it again, it's purely out of protection for his girlfriend, and later implied to be from the shared knowledge he gained from Peter. As a result, he gets a very tragic Disney Villain Death.
Morbius was introduced as an arrogant jerk and a romantic rival for Felicia Hardy, and he proceeded to steal Peter's blood in his attempts to get ahead in their 'rivalry,' but the rivalry is because he needs funding to find a cure for a plague afflicting his home country, and he goes through more than enough bad karma by being turned into the TV-Y7 version of a vampire and eventually further mutated into a bat beast right in front of Felicia.
Mondegreen: Many people hear the line "Radioactive spider blood" in the theme song as "radioactive spider glider" thanks to the garbled electronic lyrics.
Moral Event Horizon: If Kingpin didn't already cross it by the time Daredevil made his appearance, he certainly did after letting his son be convicted of his own crimes to keep his reputation clean. He justifies this with the coldly-delivered "sacrifices must be made", in essence doing the exact thing his father did to him, without any remorse to speak of.
Especially odd is their treatment of Morbius; any kid knows what vampires do, so who exactly did they think they were protecting? Not only is his hunger for plasma not nearly as threatening as a thirst for blood, but plasma is 90% water, so he could easily get a drink from a water fountain and he'd be fine.
The show was pretty infamous for seeking to avoid every variation of "die" or "kill". Sometimes the aversion of the word death would take the dialogue into this territory. In the episode "Return of Hydro-Man, Part II", Mary Jane says, with all seriousness, "I just can't shake the feeling that when we find out what's wrong with me, it's going to lead to my destruction!" Serious intents or not, try saying that out loud and see what kind of reaction you get. This Mary Jane was later revealed to be a clone, and did indeed die shortly later.
After a while a lot of the fights started to look silly due to the fact that censors wouldn't allow Spider-Man to do the kind of knock down drag out fist fighting that superheroes are known for.
Spidey sounding like a an old man with breathing problems as he shakes his fist and yells "YOU'LL PAY OSBOOORNN!".
The cab drivers from the episode "Attack of the Octobot." Big time, especially Mousie. It's mostly due to their annoying voices.
Anna Watson, an Obnoxious In-Laws that has nothing but bad things to say about Peter in spite of the fact that Peter was never anything but courteous towards her.
Take That, Scrappy!: Spidey's tirade against Madame Web matched what many viewers felt about her.
Spider-Man: I am sick of you... and your riddles. And your lessons! And your SUPREME ARROGANCE! Don't you ever, EVER enter my life again! Do you hear me? DO YOU HEAR ME!?
And she didn't, at least until the "Secret Wars" episodes. Which she says she foretold about before leaving.
The Untwist: The identity of the Hobgoblin, thanks to Mark Hamill's distinctive voice. Even the credits didn't try to hide it!
Villain Decay: Many of the villains within the course of the show suffered this. Most glaring would be:
Dr Octopus, who became a mere flunky for the Kingpin, even giving up on his plans to become The Starscream shortly after the time he got defeated by a child.
Hobgoblin, who was revealed to be nothing more than a petty crook and a wuss in his last appearance.
And Alistair Smythe, who Took a Level in Badass by becoming a mutant and leaving the Kingpin's services only to end up becoming a flunky for Silvermane in an even less important position than he was as the Kingpin's lackey.
What an Idiot: In "Day of the Chameleon," none of the SHIELD agents present noticed that "Nick Fury"'s eye-patch was on the wrong eye, despite being right in front of them. Spidey was briefly fooled, too, but he noticed after mere seconds and despite being farther away.
The Woobie: True to the comics, the sheer amount of crap poor Spidey gets put through over the course of this show, particularly from the second season onwards, is unbelievable.
Woolseyism: In the Russian dub, a direct translation of "venom" wouldn't match the lip movements, as well as sounding somewhat awkward. What did they change it to instead? The admittedly cooler name, "Black Death".