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.
Hollywood Homely: Grenouille is a disheveled, scarred, filthy, bone-thin, and socially inept man, but he's played by the dashing Ben Whishaw. It's questionable whether this is also an example of Adaptational Attractiveness, since the character is clearly supposed to be unattractive.
To be fair, an awful lot of the main film cast are downright gorgeous, considering the time period - most of them still with their hair and teeth and fairly good skin. The massive orgy scene towards the end is a good example of this.
Fans either prefer their older sound and think their newer songs are losing their touch, while other fans adore their new sound and think it's a step-up from older songs.
Fans either prefer their softer songs and hate their edgier ones, or vice-versa. note In interviews, the girls have called the styles "cute Perfume" and "cool Perfume" respectively. Can (but doesn't always) overlap with fans preferring their old or new sound as many older songs are softer while many newer songs are edgier.
Ear Worm: A fair estimate would be every single from "Electro World" onward.
Judging by the reaction from live audiences, "Polyrhythm", "edge" and "Chocolate Disco" turn fans CRAZY. "Chocolate Disco" and "edge" proved so popular that they each got three separate official mixes.
Ensemble Darkhorse: Quite a few of their B-sides which fans often prefer to their corresponding A-sides:
"Hurly Burly"; many like it more than "Spending All My Time" and were devastated that it did not make it to the "Level 3" album.
Fandom Rivalry: with those of Kyary Pamyu Pamyu (thanks to shared writer/producer Nakata) and Babymetal (thanks to shared choreographer MIKIKO). Western Perfume fans seem jealous of the attention/success the other 2 have gotten in their regions.
Despite this, Kyary and Perfume seem to be on okay terms. Kashiyuka in particular has been called an "older sister" by her.
Before "Polyrhythm", Perfume was a quirky, Shibuya-kei-inspired technopop group (to the point where equally next-level single "Electro World" only made a minor dent in the singles charts.) As one NHK documentary put it, "the reason why they are now facing a crowd of 50,000 is because of this hit song." And it shows.
While their choreography has always been their highlight, fans agree the dances have become even more impressive "Spring of Life" onwards.
The "Spending All my time" PV has the girls holding hands, grabbing each other's shoulders, and A~chan singing Loving you, so loving you forever to Nocchi's face.
They're seen holding each other in the "I Still Love U" PV.
Love It or Hate It: Just about every song since "Spring Of Life"note (which—coincidentally or not—is also when they switched labels to have a greater international presence). In particular:
"Spending All My Time"; some fans hate it for resembling American technopop and trying to appeal to Western audiences, while others love it and appreciate its uniqueness from previous songs.
"Mirai no Museum"; the song's infamously known for being more mainstream-sounding and less Perfume-like as it was used for a Doraemon movie. Some fans hate how childish it is and how it resembles other idol J-Pop girl-group songs, while others understand that the song suits the movie and like how cute it sounds.
"Magic of Love"; even though the girls have called it the quintessential Perfume song, some found it boring for not trying anything new.
"Cling Cling"; some have accused it of not only sounding like a Kyary Pamyu Pamyu song note (remember that they have a common writer/producer in Nakata, which has led to Fandom Rivalry), but sung like one as well.
Nakata's remixes; fans think they're either a step up from the original songs or just unnecessary.