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: The Karate Kid
YMMVs for the original film series:
Awesome Music: "You're the best, around, nothing's ever gonna keep you down!"
Bill Conti's score deserves mention also. Including the main theme derived from Survivor's "Moment of Truth." Survivor had the freakin' market cornered on rousing 80's anthems.
Complete Monster: Kreese, Mr. "A man faces you, he is the enemy, an enemy deserves no mercy."
Terry Silver from the third film is just as bad, if not worse.
Memetic Mutation: Many things, most famously the Crane Kick in the sunset image. But some of the dialogue has achieved that point as well.
"Get him a body-bag! Ye-heah!" "Sweep the leg." "Johnny, you're a cream puff!" "Banzai!" "Daniel-san." And of course, "Wax On, Wax Off."
Moral Event Horizon: Chozen crosses this by refusing to help Daniel save a child's life during a storm. Just in case nobody got it, in the finale he holds a knife to Kimiko's throat and punches her lights out.
Narm Charm: Glory of Love would've been a super ultra narmy and cheesy love song that Tastes Like Diabetes... if it wasn't performed by a pro like Peter Cetera, who makes it really charming.
YMMVs for the 2010 remake:
And the Fandom Rejoiced: "How dare they remake a beloved franchise just so Will Smith's kid can have starring role...wait, Jackie Chan is playing Miyagi?"
Awesome Music: About midway through the film, a Mandarin version of "Dirty Harry" by Gorillaz can be heard. Commence scooping up the pieces of your mind now.
Complete Monster: Perhaps not as flashy as some, but Master Li teaches children to savagely beat each other into unconsciousness. The definition of child abuse is too restricted.
He Really Can Act: Jackie Chan plays a dramatic role surprisingly well.
Fans initially scoffed when they heard that Jaden Smith was playing the Daniel-san expy, accusing Will Smith of nepotism. However, Jaden's performance was also praised.
Toy Ship: Both Dre and his crush Mei Ying are both around 12 years old.