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.
Broken Base: Despite the positive critical reception, most moviegoers seem split on this movie. Is it a return to form for Tim Burton and his best movie in years or an unnecessary padded-out example of style over substance?
I Am Not Shazam: The dog's name is "Sparky" and the owner's name is "Frankenstein". There's no "weenie" in the movie.
Marty Stu: Victor. May make sense, since he's sort of a Tim Burton Expy.
Nightmare Fuel: In a movie focused upon bringing dead animals back to life, Weird Girl is seriously the creepiest thing in the film, especially with those eyes that make up 90% of her head. Edgar and the crazed expression on his face throughout most of the movie could also count.
Then there's Mr.Whiskers' transformation, as we get to experience every part of it; from his limbs and neck unnaturally extending, to wings graphically breaking out of his back, and all through it the pleasant sounds of his bones cracking and his yowls of pain. No way that isn't a kiddie version of The Fly, with a little bit of An American Werewolf in London thrown in.
The Disney logo itself can be scary if you weren't expecting the Logo Joke to happen.
What Do You Mean, It's for Kids?: An Animated Adaptation of a short film that Tim Burton made back in the mid-80's, has some very horrifying, violent, and disturbing scenes. Yes, that is expected in a Tim Burton movie, but none of his other animated films are anywhere near as violent as this one (except for 9). And it got a PG rating from the MPAA, and is being marketed toward kids at Subway through mainly making it about A boy and his undead dog.
The Woobie: Admit it, you felt bad for Victor at least once.