!!The manga:
* HoYay: Tokai. For example, when Kyoko's [[TheDragon Dragon]] Ozaki needles him about "taking it up the ass" from his one-time protege Hojo:
-->'''Tokai:''' (smirking) "You should let him do you, too! It's not just your ass! It rattles your whole insides! Wham! Wham!" (to Kyoko) "You want Hojo to give it to you so bad you can't stand it, can you!"
::: And he has many, many other lines like this throughout the series.
* MagnificentBastard: Hojo, Asami, Isaoka
* TearJerker [[spoiler:Asami's death]]

!!The TV series:
* DieForOurShip: Inflicted on Clara Griffin by those who are against the Will/Clara ship. [[spoiler: You can all relax now, she dies during the second half of the 2nd season opener.]]
** Then Abby Corrigan showed up... man, Will can't get with ''anyone'' without fan backlash against the poor girl.
* DracoInLeatherPants: John Druitt, especially after his CryForTheDevil moment in "Haunted". Tesla too, although not quite to the same extent.
* EnsembleDarkhorse: Tesla.
* FanPreferredCouple: While Helen/Druitt is canon Helen/Tesla is more favored both in and out of universe, especially by Tesla. Ascended to OfficialCouple in the last episode.
* FridgeBrilliance: Ever thought that, for someone who tried to artificially extend his life so long in the first place, Watson was strangely accepting of his death in ''Revelations'', what with him not even trying to fix his anti-aging suit when he knew it was failing? Well, thanks to Helen's time traveling back to the Victorian era in ''Tempus'', Watson knew that he would be dead by the time period she came from, which he knows to be between 2010 and 2015 (from her driver's licence). So he always knew that he could extend his life only until then, no matter if he could technically make it last longer or not. ''Revelations'' aired in 2009.
* SugarWiki/HeartwarmingMoments: "If you ever do that to me again, I will shoot you myself." The friendship between Henry and the Big Guy is pretty much one of these all over, all the time.
** "Magnus, never, ''ever'' ask me to [[spoiler:kill you]] again."
* HoYay: Druitt and Watson. Also qualifies as FoeYay. Watson also seemed to have quite a bit of affection for Will, and vice versa. (Then again, Watson ''is'' played by [[Series/{{Highlander}} Peter]] [[EvenTheGuysWantHim Wingfield]].)
** Female example: Helen and Ranna. Oh, so very much.
*** Another female example: At the end of "Monsoon". Surprisingly enough, Helen reciprocates!
* MagnificentBastard: Tesla.
* {{Narm}}: [[spoiler: Will's dance for Kali. It was a pretty cool dance though.]]
** Most of what Will does after getting linked to Kali/Big Bertha. The torture scene was, in fact, downright hilarious, among other things; at least some of it ''had'' to have been deliberate.
** In the MusicalEpisode, Abby's VillainSong is interlaced with Will dispassionately mumble-singing. [[spoiler: Abby's near-death experience]] was similarly ruined by Will's solo. One thinks that this also must have been deliberate.
* NarmCharm: As above, Will's dance for Kali. The fact that said dance is a full on show stopping UsefulNotes/{{Bollywood}} dance number ''has'' to mean they did it on purpose. It's just too damn ridiculous to be an accident.
** In-universe as well. Look at the crowd, none of them can see Will's imaginary dancers, yet none of them are in any hurry to stop watching him.
* NoYay: Henry/the Big Guy/Bigfoot
* ReplacementScrappy: Kate for replacing Ashley though according to WordOfGod Ashley just wasn't popular enough which could make Kate a plain old Scrappy.
* ShipToShipCombat: [[BelligerentSexualTension Helen/Nikola]] vs [[LoveMakesYouEvil Helen/John]] vs [[DryDockedShip Helen/James]]. Meanwhile, [[MentorShip Helen/Will]] shippers are roundly mocked, and [[HoYay Helen/Ranna]] shippers are thoroughly ignored.
* SpecialEffectFailure: Not the low-budget CGI (which is surprisingly decent) but the goofy-looking muscle suit that the lead actor wears when he's turned into a hulking freak in one episode.
* WhatAnIdiot: [[AscendedFanboy The Adjuster.]] Apparently, at no point after getting his ClingyCostume [[ClothesMakeTheSuperman with associated]] FlyingBrick [[StockSuperpowers powers]] did he draw the obvious ComicBook/{{Venom}} parallels and worry about [[PowerDegeneration the suit being harmful to his health]]. Given how it's stated that the suit won't go off until you actually want it off, it's probable he didn't care.
* TheWoobie: Henry.
* WoobieDestroyerOfWorlds: Adam Worth.

!!The fanfiction
* DarknessInducedAudienceApathy: The sequel, to some. This is not helped by its copious usage of IdiotPlot.