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: Assassin's Creed
Archive Panic: The series' convoluted ongoing Myth Arc and its regular annual new releases has led new fans to be Locked Out of the Loop with the massive troves of backstory and Info Dump needed to get up to speed, as of now the series has Four Numbered Sequels but 6 Main Console games, not including PSP, Nintendo DS and PlayStation Vita releases, or for that matter the novelizations by Oliver Bowden, one of which Assassin's Creed : Forsaken has attained canonical status, or the Graphic Novels. The main games are also very long, which means that if you want to start on the series as a newbie you have a busy month and a half ahead of you.
For Black Flag, it's Pirate's Creed or Grand Theft Man O'War
It Was His Sled: The original trailers and information did their best to hide the existence of Desmond and the modern storyline, except for a few out-of-place "glitches" (now recognizable as elements of the Animus). A rather fancy trick, given the fact that Desmond's storyline is of greater overall importance.
Desmond or any part of the modern plot was only shown in two trailers ("Black Room" and "Gameplay" for Revelations) and the press-releases close to never talk about it. The twist can be still held up under the right circumstances.
The idea of the Templars trying to take over the world, while the Hashashin try to stop them has been done before in the Broken Sword series.
Sidetracked by the Gold Saucer: Despite the games focus on unearthing a particular set of memories of a character or a moment in history, the gameplay encourages sidequests as a means of furthering synchronization. This leads to all kinds of Headscratchers like in Assassin's Creed III where in the Present the earth is on the brink of an upcoming solar flare, Desmond should ostensibly have little interest or time to the many sidequests his ancestor has access to.
On a wider note, this is the principal accusation leveled by Minerva on the Assassins vs. Templar conflict, noting that they spent far too much time searching for Pieces of Eden to control or keep out of hands than using said gifts to find the Grand Temple and solve the crisis together.
This becomes Harsher in Hindsight where at the beginning of Assassin's Creed: Brotherhood, after discussing Ezio's vision at the vault, the Assassins debate on their next course, with Mario showing interest in the mysterious 'Desmond' while Ezio is focused on consolidating the Brotherhood and Machiavelli is obsessed with defeating their surviving enemies who he notes, accurately, are too dangerous to ignore altogether. In other words, the Assassins throughout history were often diverted from their real responsibilities.
Stop Helping Me!: In the platforming sequecnes, the camera will often helpfully pan over to demonstrate your intended jump, but throws off your directional controls since they are relative to the camera, not the character.
Unfortunate Implications: Some of the protagonists can come off as this. An angry Middle Eastern man out for revenge, a womanizing Italian guy with a temper and penchant for cursing, and a stoic Native American who speaks little but fights hard? Whether or not it was intentional, many of the protagonists adhere to Western stereotypes. Even Haytham and Shaun are the stuffy, arrogant British guys.
They seem carved out of the stereotypes but are considerably more complex and acquire Character Development and many shades and aspects. Ezio starts out as an Italian lothario with a hot temper but becomes calmer, and more composed and eventually commits to a loving marriage. Connor is considerably more loquacious and erudite and sophisticated than Native Americans are usually seen in popular culture. And in comparison to Shaun and Haytham, there's Edward, a Working Class Hero.
Indeed the series as a whole is exceptional in the sheer diversity of viewpoints and characters it shows. To the point that when Edward Kenway was announced as the hero for Black Flag, he, a White, Blonde, British guy, marked the exception rather than the rule for the series.
Villain Decay: Zigzagged throughout the games, the Templars can be portrayed villains that make a legitimate point with their goals, such as with Al Mualim in the original, but apart from the Revolution era ones in the 3rd game, the later games simply portray them as power hungry raving lunatics that want to cause The End of the World as We Know It to solidify control when they already rule the world.
That said population control/reduction is one of their long term aims. Their involvement in both World Wars has members express a desire for as much people on both sides to die as possible. What better way to shape the world as you see fit than to start from scratch.
The Woobie: Subject 16. Everything about Subject 16. The Trauma Conga Line he goes through could put many of the entries on that page to shame. He's captured by Abstergo and forced to spend days at a time in the Animus, reliving the lives of numerous ancestors until his mind fractures completely under the strain. Yes, that includes every awful, traumatizing thing they ever experienced, and at the very least we know that it includes watching the hanging of Ezio's family, probably made infinitely worse by the fact that it's implied that he was eventually unable to separate himself from his ancestors while in the Animus (and outside of it), and therefore felt their pain as if it were his own. He probably lived for at least a hundred years' worth of mental time in the Animus. By the end, he can't tell what century it is, or even who he is. He knows he's broken, knows he's insane, and desperately wants to die to escape it... but he also knows that he needs to impart a very important message to Desmond. Therefore he kills himself by slitting his wrists — with a ballpoint pen — so he will be able to paint messages in his own blood all across the floor of the Animus room and one wall of his cell because he knows that Eagle Vision will reveal them even once the blood is washed away. But the poor man can't even rest then. Brotherhood reveals that he uploaded a copy of his own mind to the Animus, broke it into several chunks for Desmond to piece back together, just so he could be sure to pass more information onto Desmond. In Revelations, Subject Sixteen is finally identified by name: Clay Kaczmarek, and he shows up fully-formed for the first time. Yes, ever since Desmond put Clay's mind back together, he's been stuck in the Animus. In his own words, he's been "Playing. Learning. Waiting. A lot of waiting." Although he's tough on Desmond, he still goes out of his way to help, explaining the necessity of a Synch Nexus and distracting the Animus to keep it from deleting Desmond's mind. In the end, Clay sacrifices himself, allowing the Animus to delete him in order to give Desmond time to escape into Ezio's partition and create the Synch Nexus that Desmond needs to wake up. And finally, the cherry on top of the massive Woobie cake is The Lost Archive DLC. One of the things it reveals it that he didn't have a very good relationship with his father. When 16/Clay told his father that he got into engineering school (as his father had been haranguing him to do), the man's response was "I didn't think you had it in you." He then berated 16/Clay because it wasn't one of the best schools. The fact that Clay's dad truly does love him makes things worse in the final message of the DLC, which has his dad leaving a message for him that starts out sounding typically irritated, but it quickly becomes clear that he's called out of concern when it ends with "Call me. ...Let me know you're okay.". And his mother told 16/Clay in an e-mail that she'd had enough and was abandoning both him and his father. It's also revealed that the reason Clay was in Abstergo in the first place was because Desmond's father convinced him to allow the Templars to catch him and subject him to the mind-raping nightmare that is the Animus so that he could pass information about the Animus project to the Assassins. Once he had the info, Lucy was supposed to get him out. Why did this not go to plan? Because Lucy betrayed him. Oh, and after he killed himself? Abstergo dumped his body in a river.
Weapon of Choice: In the first game, most of the focus is on Alta´r's swords, as they are continually upgraded throughout the plot; theEziostories focus on his hidden blades, as he receives multiple upgrades that turn it into a Swiss-Army Weapon (Hidden Gun, Poison Darts, Hookblade, etc.); and Connor has a lot of focus on the Tomahawk, though dual wielding in general is his thing. Desmond himself prefers two small knives in combat, using Connor's fighting style. Edward Kenway is shown with a lot of guns in his promotional shots, along with two large cutlasses.