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.
Award Snub: They have yet to be inducted at the Rock and Roll Hall of Fame. But at least the 2009 Brit Award for Best Live Performance was won (deservedly), and in 2011 they got their long overdue Grammy (Best Metal Performance of 2010, "El Dorado").
Big Lipped Alligator Moment: The upbeat and happy istrumental section in the otherwise dark and depressing "The Man Who Would Be King".
Covered Up: Janick Gers wrote the riff that opens "2 Minutes to Midnight" for a song by his previous band White Spirit, called "Midnight Chaser". Adrian Smith, a friend of Gers, borrowed the riff with Gers' permission.
In fact, that riff's structure is astonishingly common in metal, present in other songs like Accept's "Flash Rockin' Man" and Riot's "Swords and Tequila".
The song "22 Acacia Avenue", which is sub-titled (in the original liner notes only) as "The Continuing Saga of Charlotte the Harlot" which was the name of a song on their debut album.
Dork Age/Fanon Dis Continuity: The only albums which don't fall in this are the ones going from The Number of the Beast to Seventh Son of a Seventh Son. Otherwise:
No Maiden existed before Bruce Dickinson arrived. (Denial of the Di'Anno era)
No Maiden existed without Adrian Smith and Bruce Dickinson (Denial of the Blaze Bayley eranote note the "and"; that means No Prayer for the Dying and Fear of the Dark, which had Dickinson but not Smith, are not included in this definition)
No Maiden existed after Adrian Smith left (Denial of everything post-Seventh Son of a Seventh Son... sometimes including the four albums in the Turn of the Millennium)
There's also a large number of fans who consider Powerslave to be Maiden's best album.
Somewhere In Time, Seventh Son of a Seventh Son, Brave New World, and A Matter of Life and Death are also strong contenders.
As acknowledged by Steve Harris in The Early Days, many consider the band's first self-titled album to be their best. Harris has expressed his dislike of the production and has always viewed the album as a disappointment.
Misattributed Song: No, they didn't do covers of "The Ripper", "The Zoo" nor they have a song called "Silver Wings"! And "Sabbath Bloody Sabbath" is sung by Bruce Dickinson but it's NOT a song of the band. Neither are every song which Bruce did outside of Maiden. (Read: His solo career.)
Back in 1982, Maiden put out a little song called "The Number of the Beast". Based on either a Nathaniel Hathorne story or a nightmare Harris had. To this day, many people still think they're evil Satanists.
Another victim of this is Blaze Bayley, who, despite his excellent solo career, will always be remembered as the Maiden singer who tried to replace Bruce Dickinson and failed.
Paul Di'Anno spent a few years trying to carve a solo career for himself and eventually just gave up and focused on playing Iron Maiden songs live. Although he says he's not bitter in interviews, he clearly is.
Nostalgia Filter: Appliable to their fandom. Despite all (or at least, most) of the newer material being as awesome as in their "golden years", and despite having the same ol' lineup (along with Janick Gers) of that time, most fans will always prefer The Eighties' material over their new work. Sometimes without having heard the newer material, or hearing it while thinking in the Good Ol' Times. A pretty big part of the issue is that the band underwent somewhat of a Genre Shift after Blaze Bayley left and Dickinson came back, and went in a more Progressive Metal direction, which is really ironic, since "Rime of the Ancient Mariner" still remains as the longest song in the history of Iron Maiden, (The longest song of The Final Frontier, according to reports, is 11 minutes long) and Maiden always had a prog-metal feeling even in its heyday. (Seventh Son Of A Seventh Son, anyone?)
The reason is that every song on their last two albums is over 5 minutes long, in some cases reaching 10. Most of their early albums had one or two long songs and the rest would be average length. The recent albums can be exhausting to listen to not least because of the loud production. Harris says that he doesn't pay attention to the lengths of songs.
Averted with Bruce Dickinson: he's almost universally regarded as even better than his predeccesor Paul Di'Anno.
Blaze Bayley replaced Bruce Dickinson in the mid-nineties. A part of the fandom still bashes him despite the fact that the band chose him.
Early on, Janick Gers replaced Adrian Smith during The Nineties and felt into this, though less so now that Adrian returned to the band.
Sequel Displacement: Iron Maiden and Killers were great albums, but both are overshadowed by The Number Of The Beast.
Seinfeld Is Unfunny: They have so many knockoffs and have been copied so many times that it can be hard for younger, newer listeners to get what is so special about them.
Signature Song: "Run To The Hills" or "The Number of the Beast" are commonly brought up, though "Hallowed By Thy Name," "The Trooper" and "2 Minutes to Midnight" are considered strong contenders. There's also the the self-titled song for Di'Anno's run, which is the most-played song in all their concert tours. Outside the 80's material is "Fear of the Dark" for the 90's and "The Wicker Man" for the 00's.
Squick: "To kill the unborn in the woooo-ooomb!" from the chorus of "2 Minutes To Midnight." Depending on how you look at the other lines of the chorus, it could potentially double as Bread, Eggs, Milk, Squick.
For that matter, a number of the song's other lyrics could qualify as well, depending on how literally you want to interpret them
Although every fan and critic in 1992 thought Fear of The Dark was a million times better than No Prayer For The Dying in both production and song writing, many fans still thought it was a pretty mediocre Maiden album with too much filler and Bruce Dickinson still singing like he is auditioning for a thrash metal band. However, it is not uncommon for fans today to think of the album as a good album in its own right, mainly due to the album containing many fan favourites, such as "Afraid To Shoot Strangers" and of course, the title track.
Bruce himself as lead singer, believe it or not. While nowadays it's more or less universally agreed that he's the best singer in the band, there was initially a small, but vocal, backlash against him being in the band, since Di'Anno was then viewed as one of the aspects that shaped the feel of the first two albums. The fact that Bruce had only been in a few obscure bands didn't help, and neither did the fact that in initial tours he was singing Di'Anno, although he eventually won a good chunk of fans round with new material, and the rest is history.
The Woobie: Many of the POV characters in their songs, if they aren't evil.