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: Ojamajo Doremi
Canon Sue: Some fans consider Onpu to be this, although mentioning it starts flame wars. Her detractors claim that she qualifies due to being a famous and beloved actress, model, and singer, a better witch than the others, someone who is often looked to for (rarely-questioned) advice that any other character could have given and is portrayed as being loving and sweet even when she can be rather rude. However, she is occasionally proven wrong or portrayed as being a jerk (particularly when she first shows up), and most Magical Girl characters are like this anyway.
Hana gets some haterade because she is essentially this as well due to her status of being the Sixth Ranger with a Special Snowflake Syndrome. She's so powerful she doesn't need to be in Magical Stage, she's usually the one who accompanies Baba through the door of the former witch queen's heart, she's the only one capable of destroying the curse of the brambles (with the help of Pao), she's crowned the future queen of the Witch World, and she's well-liked by everyone. Doremi and the girlssometimes spoil her because she's cute, and all the boys in class 6-1 (except for Kotake) have had a crush on her at some point. In fact, all the members of the Flat 4 were hitting on her during their first reunion episode.
Crowning Moment of Heartwarming: Doremi encouraging her sister to take piano in the Sharp movie after telling her why their mom didn't teach her. Cue episode 40.
"Hana-chan, I love you. Daisuki yo..." "...Momo..."
The whole series is built around these, as most of the episodes are about the girls helping their classmates/family with their problems. In the fourth season it even becomes a main plot point for them to awake the heartwarming memories of Majo Tourbillion.
Die for Our Ship: Shiori and Fujio are sometimes this for Hazuki × Yada fans, while there's some decent-sized Ship-to-Ship Combat between Kotake × Doremi, Akatsuki × Doremi fans, and Doremi-yuri-pairing fans. Imagine how the fans reacted when Aiko was given a Love Interest in Naisho where she neither admitted nor denied attraction to him, causing an uproar from fans who paired Aiko up with Nobuko/Momoko/Onpu.
Also, Marina and Sachiko by spades. Although they were just side characters and haven't been featured in an episode together, they seemed to be popular characters because they were featured on more merchandise than even Majorika and Lala.
Fan Dumb: A lot of episodes, moreso in Dokkan, which has more themes of transitioning into pre-adolescents than the rest of the series, have so much depth and concept to them that many fans actually overlook the intentional messages in them. For example, in episode 9 of Dokkan, Hazuki gets jealous when Masaru Yada starts becoming better friends with local Ill Girl Shiori Nakayama. Up until then, Yada's only female friend was Hazuki, and naturally, Hazuki feels uncomfortable realizing that Yada is opening up to people other than her. The episode mainly deals with Hazuki overcoming changes in friendship, but to Hazuki × Yada shippers who don't care? "OMG, why is that black-haired girl getting in the way of my ship, roar!"
Fanon: Fami's surname being Harukaze. Some people forget that since she's Doremi's granddaughter, Doremi married someone and by japanese tradition adopted the surname of her husband. Plus, if we assume Doremi had a daughter, the daughter also adopted the surname of her husband. To sum it up: unless Doremi divorced (or not even married to begin with) and re-accepted her maiden's name and then had a son, or a daughter who also divorced/not even married, Fami's surname is not Harukaze.
Freud Was Right: The episode where Hazuki is held captive (by who she would help become popular comedians by the end of the episode). When the others come to the rescue, the first thing they see is (through the window) one of her kidnappers standing next to her... while she's in a corner... and crying "no, don't"... (seriously, it gives such an oh-so-wrong impression...)
Growing the Beard: The later seasons are generally considered to be far better in overall quality.
It Was His Sled: Not a twist ending, but almost any reference made to Hana by the fandom is to her "grown up" form. It's not new or surprising or interesting when one sees it happen in Dokkan because of this.
Les Yay: A lot among the girls. Some of the most notable are Doremi/Onpu, Nobuko/Aiko or Miho, and (if episode 3 of Motto and the second movie are anything to go by) Aiko/Momoko.
Toy Ship: The majority of the pairings. Yes, even the Les Yay ones.
Viewer Gender Confusion: Kayoko, whose extremely short hair and ambiguous voice likely threw off people until Doremi states that she was a girl (likely tipped off by the red schoolbag).
The Woobie: All the main characters and nearly all the classmates at some point.
