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.
YMMV: Dark Reign
From the game
Hell Is That Noise: The low rumbling of a Shockwave, the sibilant hissing of a Rift Creator, or the dying screams of a Martyr, depending upon which side you're playing as.
Most Wonderful Sound: The sounds of heavy turrets firing, whether it be the distinctive booms of the Heavy Rail Tower or the indescribable sound of the Neutron Accelerator.
That One Level: Level 5 in the first game, no matter whose side you were on. For the Freedom Guard, it was a Hopeless Level where you have to collect 30,000 credits while holding off wave after wave of devastating Imperium tanks. For the Imperium, you have to destroy the Freedom Guard base, while making sure the Water Extraction Compound, sensibly located inside the Freedom Guard base, wasn't destroyed. Aside from being an infuriating mission on its own, it also signifies a major upswing in difficulty for the rest of the game.
From the Comic Book
Author's Saving Throw: Dark Reign and Siege can be seen as a collective effort by Bendis and Marvel finally bringing some closure to the Civil War storyline.
Jefferson: Two fellow prisoners murdered. One raped. And that guard....
Prison administrator: He bit his hand off.
Jefferson: For sure Mr. Hyde was busy during last two months here.
Prison administrator: Last two months? Mr. Jefferson, it was all this morning.
Creator's Pet: Justified in Mighty Avengers - Dan Slott has admitted that he's focusing so hard on Pym in an attempt to rescue the character from the Butt Monkey status that writers had been handing him for years.
Hilarious in Hindsight: A few years ago there was a What If? story where Dormammu said to Brother Voodoo that Earth has to be in really bad shape if he's managed to claim the Sorcerer Supreme rank. Guess who's got the title not a few days after Osborn took over?
For bonus points, Daimon Hellstrom does point out how fucked up things are after they defeat Dormammu (and, by proxy, the Hood), citing that if someone as powerful as him can access the mortal plane through a cloak, it might still get worse.
Idiot Plot: Seen by many. The very idea of taking a known and convicted supervillainous psychopathic lunatic whose alternate persona was a crazed Mad Bomber and putting him in charge of National Security (with dictorial powers and backed up by a team of other supervillainous psychopathic lunatics, no less)...for many fans, that was just stretching it, even for a franchise like this one. Didn't help at all that Civil War (where Osborn was first given national security powers, albeit subordinate to Iron Man and others) took place only a couple of story arcs after Osborn had been exposed as such; had this story occurred only three or four years earlier, it would have made a lot more sense, as although most heroes already knew who and what Osborn was, the public did not. As it is, people cheered for a man who had, amongst other things, attempted to exterminate all life on Earth in a fit of worse-than-usual madness, deliberately caused a bus to crash into a school in order to frame (and in the event, cripple) the driver, and had, before one of his final pre-Dark Reign captures, been mentioned offhand as taking a entire church hostage and tying bombs to a young girl to draw Spiderman into a fight. Villain with Good PublicityUp to Eleven right there.
Like You Would Really Do It: Let's face it, no matter how Matt Fraction tried to draw out the drama, nobody reading the Iron Man comic actually believed that the whole long-term suicide concept would end in death, even those who hadn't seen the future solicits for the book. Because of this trope, the video message in issue twenty ended up re-igniting some Internet Backdrafts over Iron Man's characterization, as many readers saw Tony's noting that his life was in the others' hands as viciously manipulative, since he knew heroic nature would keep them from just letting him die, while others saw it as a very badly handled attempt at contrition.
Norman crossed it years ago multiple times, but a few his actions during Dark Reign are worth mentioning, especially what he wanted to do to his own son, and what he did do, albeit indirectly, to Chicago.
Sentry (or maybe Void, or even both)'s crossed it by killing Ares.
Norman Osborn: Are you still slapping women around?
Henry Pym: Are you still dropping them from bridges?
Nightmare Fuel: Sentry/The Void in Siege Not only his newly revealed secrets are damn scary, but also the way he kills Ares by tearing him apart, without a single word or any emotion can make you scream like hell.
In Dark Wolverine Bob has one scary scene, when Daken provokes Venom to fight with him. Sentry out of the blue says "stop" and everybody in the room ceases to move and looks at him scared.
Siege 3 Sentry vs Asgard, more literal than expected. Also, the final page, with the scorpion/void/storm/HELL-thing!
Daken's battle with The Punisher would practically be grounds for a Mook Horror Show if shown through Frank's eyes (and, y'know, if Frank wasn't too psychotic to feel fear). He shrugs off every last bullet and grenade that Frank throws at him, then messily shreds him into pieces — and he does this because he wants to, he could have killed the Punisher a lot quicker if he'd wanted to.
Iron Man was rescued for many people who didn't like him after Civil War, when he deleted the entire superhero database except himself from Norman's systems.
Squick: There are a lot of icky match-ups (Goblin/Menace, most of Daken's relationships...), but the big one right now is Hank/Jocasta. Readers who know anything about Jocasta's background tend to gag profusely whenever they do anything romantic towards each other, and the creepiness has been pointed out more than once by other characters as well.
The Untwist: After all the guessing about which new or forgotten character would turn out to be Norman's "secret weapon" against the Cabal, it turned out to be the Sentry/Void, which many readers had dismissed as too lazy or obvious.
What Do You Mean, It's Not Symbolic? - In the last issue of "Siege", Loki uses the power of the Norn Stones to power up the heroes. So, the god of imagination (yes I know Loki does other things as well, but still) decides to favour the heroes over the mindless engine of destruction. Hmmm.
The Sentry and the Void. Sentry is supposed to be the "ultimate hero" while the Void is the "ultimate villain". Dark Reign began with the Sentry joining with the villains, the fall of the ultimate hero, and it ended with the Void's death, the defeat of the ultimate villain.
The Woobie: Jessica Drew. Henry Pym, a little, though he's been getting better.
Norman, the villain, becomes this over the course of the series. There are very few people who actually believe that he wants to make the world a better place, he and his team get kicked around a lot, and none of the heroes are particularly menaced by him, thinking he'll end up destroying himself, something even his fellow villains foresee.