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: The fans of the original book, in regards to the movie. Some enjoy the movie as well as the book, while others are not a fan of its admittedly extreme liberties with the source material. Some fans have found a compromise between the two, combining elements of the original book (such as the John Donne poem that serves as a focal point in the book) with the movie's designs in their fan-works.
Counts as a Broken Base for Miyazaki/Ghibli fans in general. About half think of it as a brilliant piece of art, while the other half sees it as a convoluted, messy and dramatically cryptic failure. Critical opinion is less divided (apart from Roger Ebert's panning of the movie), and Howl has a solid 86% approval rate at Rotten Tomatoes.
Ending Fatigue: The city is bombed, Suliman's henchmen make their final assault! What will the protagonists do? Howl leaves to battle, Sophie takes everyone with her to a safe place and destroys the castle. The Witch of the Wast grabs Howl's heart from inside Calcifer, Sophie pours water over them, breaking Califer's power! She and Heen fall down a chasm. She enters a door into Howl's past, sees him giving away his heart, returns to the present and saves Howl. And saves the turnip, who turns out to be a cursed prince. It's not that it doesn't work, but it does drag on and on.
A minor meme has developed on Tumblr with regards to the startling resemblance Madame Suliman's page boys bear to Attack on Titan's Armin Arlert.
Hollywood Homely: Young Sophie. She seems to pretty much be the only one who considers herself homely. It's more of a self-esteem problem. It seems she turns old and ugly when she thinks of herself as ugly.
The Woobie: Sophie, particularly when she's first cursed and constantly tells herself not to overreact, when it's clear she's overwhelmed. Then she leaves home because she doesn't want to be a burden. Then her mother sells her out without Sophie even knowing. Life is rough for Sophie.