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.
Alternative Character Interpretation: Whether V is really a hero or just a lunatic who would rather screw over the world than be controlled by his government. Alan Moore readily encourages readers to come up with their own interpretation of V. A common complaint about the movie is that it lacks the ambiguity of the original.
The "Sutler" name probably seems more anvilicious to those who know it was changed from "Susan". To someone coming from it cold, the first half makes it not-very-"Hitler"-like.
Award Snub: Hugo Weaving's amazing performance as V went unnoticed at award shows.
Draco in Leather Pants: Yes V is the protagonist but that doesn't really make him a good person. The comic makes very clear that V is just as capable of bastardry as the Dictatorship, even if he has good intentions.
Cry for the Devil: V for some. He is shown to be a terrorist and murderer, but the film also explores his Dark andTroubledPast.
Ensemble Darkhorse: Finch has a lot of fans especially among readers that aren't entirely convinced of V's virtue.
Genius Bonus: In the film, when V drops in on Creedy's residence, their conversation is masked by Beethoven's 5th Symphony — the viewers only hear the first bar but, when interpreted as Morse Code, it's the letter V (...-).
Meaningful Name: In addition to sounding a little like "Hitler," "Sutler" is an old word for merchants who sold goods to the military, implying that the dictatorship represents the "military-industrial complex." (This fits in with the fact that the lead villains, including Prothero, the "voice of London," got rich at Big Pharma after the evil experiments were over.)
Memetic Mutation: Like you wouldn't believe. From a single Epic Fail Guy comic to the face of worldwide protests. Today, V is the face of Anonymous. Along with the infamous "V" speech. Evidently, Moore is actually quite proud of this fact, but is a little annoyed that it was sparked not so much by his comic as by "the rubbish movie".
Misaimed Fandom: Meta-example, as it did this to Guy Fawkes. It's true that Fawkes entered Parliament with honest intentions, but few actually know what those intentions were. He wasn't trying to take down an authoritarian government, but instill a different one (indeed, since the Catholic church strongly believed in the divine right of kings, Guy Fawkes's co-conspirators would most likely have abolished the power parliament had claimed from the crown). He wanted England to move from the Church of England, which was oppressing to the Catholic Church, back to the Catholic Church (which would then have oppressed the Church of England).
The movie has spread the misconception that November 5th, Guy Fawkes Day, honors Guy Fawkes, the plucky rebel, instead of celebrating the fact that England narrowly averted a terrorist attack on the capital. It's like thinking September 11th honors Osama Bin Laden.
On top of this, Fawkes wasn't The Mastermind, he was The Brute of the operation and a somewhat incompetent version of that to boot. One of the reasons he was sent to be the triggerman was because he was deemed relatively expendable to the more important conspirators. But then I guess "Robert Catesby Mask" doesn't have the same ring to it....
V. Though the film does play the hero angle a bit more straightforward than the comic book, it's still made very clear in the film that V is a terrorist who took his likings of Fawkes' philosophy too far.
Narm: In the comic book, the government leader and blatant Hitler expy is named Adam Susan. Heil Susan! Changing it to "Sutler" in the film seems overwrought, but at least it actually sounds menacing.
Rooting for the Empire: Happens to V himself, thanks to being portrayed as a saint in comparison to the Norsefire government.
They Wasted A Perfectly Good Line Art: It was originally released in black and white, and then recolored by a different person. With watercolors. In quasi-impressionistic colors. Without paying attention to the lines.