* BrokenBase: Before the advent of version 5, there was a sharp divide between which versions to use. Some stuck to vanilla 3.9, others preferred 3.9 with the 3.9+ mod. Others preferred 3.95. VideoGame/InTheGroove fans stuck to [=OpenITG=]. A small contingent preferred 4.x. However, since the creation of sm-ssc (and it becoming [=SM5=]), this divide isn't as pronounced as it once was.
* DorkAge: The 4.x builds. They never reached widespread adoption since they were rather buggy and unstable, and most of the community stuck to using the 3.9 build (and the 3.9+ mod) or the sm-ssc fork. Fortunately, things have since picked up, with sm-ssc being merged into the main repository as version 5.x (and the opening of a [=GitHub=], with the sm-ssc team now spearheading the development of the game.
* FandomRivalry: With ''VideoGame/{{Osu}}'' , mainly due to the game pandering to anime fans (which Stepmaina already does with the Otaku Dreams packs), being much more popular and [=OsuMania=] practically being a broken knock off of Stepmania proper.
* GameBreakingBug: The Assist Tick bug, which will crash Stempania if you have the assist tick on in the editor and you stop testing a chart. Happens randomly too, and only in the mode people would use the assist tick.
** Sometimes editing in ''5'' can glitch out on playback and not play the audio.
* GoodBadBug: [[http://www.stepmania.com/forums/showthread.php?t=24289 Negative BPMs and Negative Stops.]]
** Ironically, the only reason it was patched out was because it messes with scoring. The update immediately after the above [[http://www.stepmania.com/forums/showthread.php?t=24305 adds a much easier to use variant]] that also plays nice with the scoring system.
** This causes lots and lots of {{Suddenly Harmful Harmless Object}}. A wall of arrows or a set of holds might turn out to be mines - or alternatively, the mines you try to avoid turn out to be arrows, causing you to miss them. {{Trial And Error Gameplay}} follows.
** This has since become an AscendedGlitch with support for Warps in [=StepMania=] 5.
* MemeticMutation: Anything from the Bemani community partially overlaps into Stepmania communities.
** An True Hero
** [[{{Mondegreen}} You need a]] [[http://www.youtube.com/watch?v=-0bDg8oCTJE lawn!]]
** [[http://www.youtube.com/watch?v=uJPysAmX9zg TAKAKU! TAKAKU! TAKAKU!]]
** Subjectivemanias
** [[http://www.youtube.com/watch?v=g6LoC9KUVtI MAD OF FIRE]]
* MemeticTroll: [=WinDEU=], who is infamous for his InterfaceScrew-laced stepfiles.
* MostAnnoyingSound: This whole game to people who aren't fortunate enough to know what the music sounds like behind your headphones. Rhythmic keytapping has been known to drive some people insane.
* SeriousBusiness:
** Why the [[LampshadeHanging Xoon Total Drama]] packs exist. Also, the Mystery Packs bring out the worst in people.
** [=VGMP4=], which was in and out of development for ''3 years''.
%% Due to the user content-driven nature of the game, please think twice before adding examples of That One Level or Boss. If we listed every hard simfile, this page would be longer than ''War and Peace''.