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.
Big Lipped Alligator Moment: The entire Pirate STC strip, based on an equally crazy Sega of Europe ad campaign, which somehow managed to make Decap Attack seem sane and logical by comparison.
Fan-Preferred Couple: Both Tekno and Johnny are more common love interests for Amy than Sonic. Amy likewise for Tekno, who is supposed to be paired with Shorty
Fanon Discontinuity: STC had its fair amount of bad strips that fans would rather forget, such as Bravehog, The Trickster and the biggest stinker of them all; Amy's Secret Past which had no regard for continuity whatsoever. Ugh.
Surely Bravehog was the bigger continuity criminal, totally overriding Sonic's backstory? Its art was significantly worse than Amy's Secret Past, too.
Ironically, those two also contradicted each other: Amy's Secret Past was an attempt to explain why she has similar slicked-together spikes as Sonic despite not having superspeed (him having obtained them during the accident which gave him this) while Bravehog showed all the hedgehogs in the past looking like Sonic.
Draco in Leather Pants: Super Sonic is the most well-known character from this comic, and is the one to get the most love. While people often play up his craziness, also expect to see it toned down often.
First Installment Wins: Very few of the other comics are remembered. Then again Sonic was the basis of the pun in the title, the magazine mostly revolved around him, and his story got all the plot development.
Growing the Beard: The original issues were mainly crude one-shots with little continuity and often horrid artwork. It was also more comical then later issues. At issue 8 is when they decided to gain an actual plot, though even then it took a few issues to fully grow its beard.
Jerk Sue: Sonic, according to Word of God- Nigel Kitching has stated in-interview that Sonic being mean to Tails and getting away with it was very much his intention.
Narm: Shortfuse's aforementioned habit of explaining his origin in every single appearance gets this way after a while.
There were several examples in the non-Sonic stories as well. From the Eternal Champions strips there was Xavier's frequent battle cries warning his foes to fear "the power of magick!" only for it to very rarely work.
From the character guide included in the Eternal Champions special issue each character has a profile which links their greatest fear to the cause of their death, so Trident (who was crushed by a pillar) gets "unnatural fear of pillars" while Larsen (who was killed by his boss, Mr. Tagliani) has "an unusual dislike of tagliatelle".
Older Than They Think: Despite being such a relatively obscure adaptation, Sonic the Comic introduced many concepts and aspects that were later used by future adaptations and even the games, some by coincidence and others due to the comic being inspiration to later Sonic incarnations:
It came up with the idea of the Freedom Fighters, which Sonic Sat AM and the comics based on it later borrowed. Some of the Freedom Fighter members from SatAM might were been inspired by the comics' characters.
It was also the first adaptation to depict Robotnik as an evil dictator who has taken over the world. His base of operations, Metropolis Zone, might have been the basis for Robotropolis.
It introduced Troopers, which were most likely the inspiration for SWATbots from the SatAM and Archie continuities.
It also showed Metal Sonic betraying Robotnik prior to Sonic Heroes.
It had a Death Egg II before Sonic the Fighters and Sonic the Hedgehog 4 came out. Though this one was mostly identical to the original one, and was created due to the original Death Egg being shown getting destroyed prior to the Sonic 3 & Knuckles adaptation, thus necessitating the introduction of a second one.
It introduced Dr. Zachary, who Doctor Finitevus from the Archie comics bears a striking resemblance to.
It also preceded Sonic X in showing Sonic's world and the Earth as existing in the same universe showing travel between them to be possible.
It depicted Amy as an Action Girl before the games did it.
Prior to Shadow's introduction in the games, the comic already had a stoicrival to Sonic who has amnesia and is obsessed with learning about his past in Knuckles.
The saga with the Metal Sonic army in the Archie comics was a reference to the Brotherhood of Metallix in StC, which featured the same idea.
Another storyline it did before Archie was Robotnik snapping and losing his sanity after too many defeats.
It had a badnik who switched sides and decided to oppose Robotnik in Shortfuse the Cybernik, who preceded Gamma from Sonic Adventure.
The Scrappy: Shortfuse isn't very well-liked for having a flat personality that doesn't really shine through (he's pretty calm for someone who's supposed to be quick-tempered), constantly explaining his origin for no reason, and in general being pointless, with some accusations of being the Creator's Pet.
Tear Jerker: For some fans, the Christmas story which sees Robotnik visited by Father Christmas, who warns him that his downfall is approaching and encourages him to change his evil ways, reminding him that he hasn't really benefited personally from his rulership of Mobius. Robotnik orders him to leave before realizing that he was right: "Keep your advice, old man! I like being evil and I don't need presents! I'm in charge! I've got power! I've got... I've got... I've got no friends on Christmas Day..."
Johnny's death. It still haunts many fans to this day.
Unpopular Popular Character: Tails. His vocal fanbase led to his solo adventures in the Nameless Zone and as 'Zonerunner' in the Chemical Plant Zone, even though he was as hapless as ever and usually triumphed by accident.