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.
Fridge Brilliance: Terry wanted to make sure Junjo got the deathmatch against him that he wished for ASAP, otherwise he wouldn't have been such an asshole to his siblings. Then again, when Junjo first intercepted him later on, he was already preoccupied with something else at the moment:
Junjo: I've waited a long time to settle the score! Terry: Don't be too impatient, I'll see you another time.
Lady Mondegreen: Even the DVD subtitles and New Line VHS closed captioning misinterpret one of Terry's lines in the English dub as "I'm nothingness for nothing." He actually says "I'm not in this for nothing."
Moral Event Horizon: The revelation that Jadot orchestrated the death of Sarai's father and misled her throughout the film.
Return of the Streetfighter
Harsher in Hindsight: Following the 2012 Aurora movie theatre massacre, the scene in Return of the Streetfighter where Rio Grandol leaves a theatre showing another X-rated martial arts film to verify over the phone that he'll be headed for Australia as scheduled before being chased by cops and killed by Terry now seems a bit too creepy.
Moral Event Horizon: Otaguro comes very close, but he doesn't get the chance to seal his crossing of it before Don Costello shoots him three times (twice in the R-rated version). Don Costello himself crosses it by ordering his men to blind Kitty, if he didn't already do so by sending them to complete the Mafia's contract on Masaoka, which results in Yamagami, Ken Mao, and Gorasing dying and Masaoka himself being tagged in the arm.
Special Effects Failure: Happens when Terry hits a mook in the back of the head, knocking his eyes out. The effect is shown using a pair of googly eyes. Horrifying the first time, hilarious everytime after.
The Streetfighter's Last Revenge
Fridge Logic: How could Aya possibly think Mr. Black's death "was too cruel" when it's quite clear from the audio that Black may have actually been killed instantly by the retort? Terry may have actually been merciful to Black by burning him at full power.
Moral Event Horizon: Frankie Black crosses it when he kills Huo Feng in cold blood during an ambush.
Narm: "I don't have to stand for any of that stuff, you pig bastard!", originally spoken by Kimiko when someone tries to make out with her over the phone while she's on the job as an operator, becomes this when she taunts a would-be rapist during the dance scene. Reused recording, much?
What an Idiot: Terry says this at the end after Aya gets herself killed.
Sister Streetfighter series
Moral Event Horizon: The villains of Return cross it by kidnapping Rika (Shurei's daughter) and using her as live bait with which to ensnare Tina Long. Ebikura proves himself even more sadistic when he leaves Kurozaki for dead and tries to take Tina and Rika down in the process, and the Big Bad crosses it by killing Shurei, who protected Rika from a trio of bullets he had fired at them.
What an Idiot: By the time Return comes along, you'd think Tina would've learned to never again trust calls that claimed something important about her mission. For all she knew by that point, the Big Bad of each film could have sent either The Dragon or a Mook to ambush her after coercing someone close to her into divulging the Red Herring against his/her will via phone.