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.
Ass Pull: Arguably. One can't help but wonder why the Gamilons use weapons that make the earth uninhabitably radioactive, if their goal is to colonize it. In the last episode of the first series, we learn that a radioactive environment is their natural habitat.. although the pilot captured earlier in the series didn't seem to need it. And it never comes up again in later seasons, where there appear to be No Biochemical Barriers.
Actually, a bit of Fridge Brilliance since considering their sister planet had the technology to clean up the radiation, the Gamilons would have that technology too. They were merely waiting for humanity to die off before moving in and cleaning everything up.
The Yamato's launching from the Revival movie, complete with the series' original opening theme.
Episode 25 is a massive Crowning Moment of Awesome for the Yamato and her crew, as the battleship, nearly crippled in the last battle with Deslar, first chase off Earth the space fortress Gatlantis, then launch an Airstrike Impossible to pave the way for a commando raid that cripples the target, and then the Yamato destroy Gatlantis. A space fortress that four episodes earlier had wiped out the entire Earth Defense Force fleet without even trying!!!
Lampshaded by a random bystander in the crowds when Yamato reappears: "It's Yamato! We still have Yamato! We're going to WIN."
In season 2, in one of the episodes close to the end. Leader Desslock had earlier accepted a commission from Prince Zordar to defeat the Star Force, so he pins the Yamato by teleporting mines over to surround it. To escape, the Yamato executes a small warp and rams Desslock's ship. Deputy Captain Derek Wildstar boards the Leader's ship. The two of them face off on the bridge. Desslock slowly levels his pistol at Wildstar, while goading Wildstar to shoot him. But Wildstar, already injured earlier, falls to the deck while drawing his. His love interest, Nova, dashes out of hiding, grabs the pistol, blocks Desslock's aim, then aims Derek's pistol at Desslock. Moments later, she drops the pistol, places Derek's head in her lap, and comforts him while he remains semiconscious. Desslock gets his Villainous BSOD as he is witnesses Nova's simultaneous display of extreme bravery and extreme devotion. It makes him change his mind about pursuing the Star Force, he declares to Nova that the war between Gamillon and Earth is over, and he offers her advice on the Comet Empire's one weak point in its mobile fortress. Doubles as a Crowning Moment of Heartwarming!
For Space Battleship Yamato 2199, they got together around 40 of the greatest anison singers, and redid the original theme music. As you can expect, they managed to take the CMOA levels of the song Up to Eleven.
The dub of the movie Farewell to Space Battleship Yamato cut 30 minutes out from the film, and used names from Star Blazers.
The most obvious plot changes in the dub are an aggressive attempt to reduce the number of people the heroes kill. This often includes claims that obviously-organic beings are robots, and hastily-spliced-in footage suggesting the bad guys escape rather than dying.
In the remake 2199, the artificial Gamiroids are introduced.
Notably, the remake is still being called Star Blazers, purely since no-one would recognize it otherwise.
Not within the show itself, but on the official website's "History of Star Blazers", certain details (other than the fact that most of the Earth characters are Japanese) are either changed or made up completely. However, there are some inconsistencies, such as the "Great Island" (where the "Wildstar" family comes from) also being called "Okinawa" (where the "Kodai" family comes from)note In actuality, "Great Island" just refers to Japan in general. The flashback in episode 13 clearly depicts Mt. Fuji, which is nowhere near Okinawa..
Magnificent Bastard: Dessler/Desslok is magnificently bastardlicious. And that's before he becomes an ally.
MST3K Mantra: Considering the fact that the real Yamato's ammunition magazines exploded when she sank (The volcano-like eruption that they caused is very accurately depicted when showing the history of the real ship in the 1974 series), making the idea of her becoming a spaceship problematic, this trope applies.
In detail, the explosion of the No.2 magazine (under the second main gun turret) caused the first 90 meters to break away and land at an angle to the rest of the ship, and the detonation of the secondary turret magazine further mutilated the wreck. Oh, and the ship "vomited" those monster, 2500 ton gun turrets as it turned over before blowing up. There's no way anyone can rebuild the real Yamato.
2199 does provide a reasonable explanation for this, being that the Yamato is actually a REPLICA, and that she was built in secret using the wreck of the real Yamato as a shell to disguise her from the enemy until launch.
However, Yamato had a sister ship, the Musashi, that sailors considered better than the Yamato (this is apocryphal—a whole lot of documents on both ships were destroyed after the war). The Musashi went down near the Philippines in October 1944 after swallowing far greater damage than her more famous sister and without any catastrophic explosions(so her wreck is much more likely to be in one piece). Uchuu Senkan Musashi doesn't sound bad at all(it also brings to mind a Bad Asssamurai), but the people of the Philippines (who suffered in the Second World War) are definitely not likely to agree (YMMV after all).
My Real Daddy: An effective custody battle began in the late 1990's between Yamato's original creator Yoshinobu Nishizaki and the legendary Leiji Matsumoto (who rewrote much of the premise as soon as he joined the project, and has the critics and most of the fanbase on his side). Both creators have attempted their own Revivals of Yamato, with various degrees of success.
Newer Than They Think: As Youtube comments will tell you, there are also a lot of latter-day fans who think the Death Star was based on the Comet Empire. Not likely, as the Comet Empire was introduced in 1978.