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: Blue Planet
Alternate Character Interpretation: The true objectives and motives of both the Vishnans and the Shivans drive the greatest mysteries of the plot. And there's no guarantee that any information that's been given about either one of them is true or not. At one point, the same conversation is shown to the human characters twice, once by the Vishnans, and once by the Shivans. The dialogue was completely different, though thematically and topically similar.
Crowning Moment Of Awesome: The entirety of the mission Delenda Est and the end of Universal Truth where the Vishnans tell the Shivans to fuck off.
The climax of Aristeia, where the UED Toutatis shows up and displays the UEF version of Superior Firepower against the GTD Hood. Namely: antimatter torpedo spam, all set to "Spiritus Elektros"!
Any time Spiritus Elektros plays is bound to be a CMOA for at least one side, really.
Demonic Spiders: The Awesome Yet Practical next-generation GTF Nyx to boot to Federation fighters, especially in War in Heaven. With eight gun banks and a high energy supply to back it, loads of missiles, and good maneuverability, this thing easily eats Federation interceptors and gunships for breakfast. The best counter is the Federation Slammer Area-Suppression Missile, which can deal enough to bring one of these to the ground (if you know how to use it effectively).
Idiot Plot: The plot very much seems like this until you read the supplementary material (most of which is found in the Tech Room databases, in both the Intel and Ship sections); then it becomes quite good, actually. The fact that it does things to the scale, depth, and dynamism that it does and still remains in the realm of true plausibility is a testament to how much thought went into it.
Even more averted upon playing the Third Act of War in Heaven, which shows that this plotline is directly tying into the unanswered questions of Freespace 2, and bringing together obscure references and minor details from all the way back as far as the first game!
Magnificent Bastard: Admiral Chiwetel Steele is a prime example of this trope. A war hero in his own right, he has contingencies for seemingly every setback, in a pinch he'll even use his flagship to perform a daring raid if he senses an opportunity to wreak some havoc. Even getting ambushed by 2 artillery ships doesn't faze him, as he just calmly comments on a "match well played" before giving them the slip.
War in Heaven does not sugarcoat war in the slightest, and some of the mid-battle dialogue can get downright horrifying, particularly when it references the fates of unlucky civilians who happened to be in the area.
"WARNING! INTERNAL TEMPERATURE AT 27,000 DEGREES! DEPLOYING DISASTER BEACON!"
— Automated transmission from a ship gutted by a GTVA beam cannon
"Oh, God. Oh shit. I can see the bodies... thousands of them. They're still moving! I can see people moving!"
— Levi (Wargods Alpha 3) witnessing said ship's destruction
Also, explore the jump flash at the end of Ken. Don't jump out right away...
Universal Truth. All of it!
"If you turn around, you will never see anything else again. Go towards the light. Go quickly. Do not stop. DO NOT LOOK BEHIND YOU!"
Player Punch: And how! Most notably the 14th battlegroup seeing the ruined alternate universe Earth for the first time, seeing again how Samuel Bei lost his wife and his mother, the murder of Elder Taudigani, and Admiral Steele executing his plan against the player's task force and finally the last minute Heroic Sacrifice of the Yangtze.
Let's not forget shooting down Xinny and Zero, SOC heroes of the Second Shivan Incursion, who were only trying to rescue their commander. At least the UEF pilots have no idea what they are trying to do, given that they think that there were nothing of interest as far as they are concerned in the cruiser's cargo.
Recycled IN SPACE!: Part 2 is an extended homage to the Vietnam War. The far-larger and more powerful GTVA is forced to fight a limited and conservative war due to political divisions and murky objectives, while the much less powerful but more ideologically convinced UEF is simply trying to hold its own and ultimately push the GTVA out by costing them enough blood. Similarly to the Vietnam War, there is no clear-cut good guy.
It doesn't help that you most often notice this during or shortly after an incredibly frustrating sequence where you have to destroy all 4 main beams of two Deimos corvettes (which have the second-best anti-fighter defences of any FS 2 capital ship), both of which are parked next to a number of Aeolus cruisers (which have the best anti-fighter defences of any FS 2 capital ship). To make matters worse, the beams are small, hard to see, can only be fired at from a few positions and they are only 4 of the 8 beam cannons on the ship (destroying the other 4 doesn't really help, and there's no way to tell which is which other than placement).
Two missions in Act 3, first is Everything is Permitted which is a Stealth Mission where there are seemingly many possible ways to complete the mission and the game doesn't directly tell you how. The other is Her Finest Hour, in which there are so many secondary objectives that can get players overwhelmed, and so many buttons to press. In both cases however, these are more confusing than Nintendo Hard. They're the kind of missions that depend more on note-taking and precise tactical micromanagement rather than piloting skill.