Base-Breaking Character: While most players find Peppita annoying, she has a dedicated fanbase who like her quirky skills. She can do a surprising amount of damage using a few exploits of the game's AI, but she still won't outdamage Cliff or Maria most of the time. Some just dislike how late in the game she joins the group, and how removed from the plot she is when she finally does join.
Albel is by far the most popular character in the game. When having to choose between who will be your 7th party member, many fans will choose him. Of the other optional characters, Nel is also fairly popular, many enjoy her tough Action GirlSpy Catsuit credentials.
Clair is pretty popular considering that she never joins the party.
Launcher of a Thousand Ships Albel has three big ones: AlbelxFayt (speaks for itself), AlbelxNel (pairing the two Elicoorians, who for bonus points were bitter enemies throughout most of disc 1), or AlbelxMaria, who's more or less the only party member who doesn't inherently dislike or openly disparage him. From a meta standpoint, Maria starts off with bizarrely high affection points for him while Albel has a high initial affection score for Nel that she very much does not reciprocate.
On a (mostly) non-romantic note, the FaytxCliff ending is usually seen as the most satisfying since it actually goes into what the post-game world would actually be like following everything that happened.
The fact that the names are so awesome McCool can be chalked up to the fact that it's an RPG. Think about some of the names you give your RPG characters.
The infamous plot twist neatly explains the frequency of human aliens in the setting. The designers of the Eternal Sphere would want their players to be able to relate to and connect with their characters. For most players, that means a character that looks mostly human.
Nel's Ice Daggers has the highest probability of freezing the target (1:3 at Lv.10) of any ice spell/attack in the game. A frozen enemy can be insta-killed, regardless of their remaining HP, provided the attack doesn't also freeze the target. Alternatively, you can synthesize the Freezing ability to any weapon you choose, allowing you to freeze most enemiesnote excluding those that are immune to freezing, or status ailments on contact.
Cliff's Aerial Assault deals 5x dmg. + ¼ that amount as MP dmg to a single target. You can augment it with the HP/MP Dmg. combat tome to triple both amounts (at Lv.10). Now set Aerial Assault to the short/strong position, so it can't be blocked.
If Fayt or Cliff has equipped the 'No Guard' support skill, it prevents them from flinching from attacks that inflict less than ¼ their total HP. Meaning, no more hit stun - allowing them to attack without fear of being interrupted. Give 'No Guard' to Cliff while he has Aerial Assault. Bye bye game difficulty.
Fayt is completely invincible during his strong button's long distance run animation. So with proper space and timing, he can charge straight through attacks such as "Nebelung Valasti" and "Ether Strike"with impunity and score two free hits.note Fayt's long distance strong attack launches the enemy, pressing the strong button again will juggle them with a flash kick.
Item creation, as might be expected, is ripe for abuse with the right inventors.
The Celestial Homonculous in Alchemy, which can be sold for twice the amount of money it took to create, which means easy money in early to mid game.
Also in Alchemy is the Orichalcum, which gives a 500 point boost to the attack power of any weapon it's synthesized onto. As most items have eight slots available for placement, this means a humongous boost in attack power that will last you well throughout the story even when placed on weaker weapons, such as Fayt's starting weapon, Metal Pipe, which is required for several Battle Trophies.
In Crafting the Boost of Prowess are quite probably the best item in the game. When first created they'll give a 5% boost to strength and defense. Further refinement allows for a total of 30% boost. Eight of these on a weapon, plus two in the accessory equipment slots = 300% boost to your character's attack and defense. On Galaxy level difficulty, with the right armor, this can make Fayt totally immune to damage from most attacks, even from the game's ultimate bonus bosses. In Universe and 4D the enemies are a bit stronger, so it doesn't work on them, but it would still trivialize everything else.
It Was His Sled: Go ahead and try to find someone who doesn't know the infamous plot twist. If you don't know it, the plot twist is that the game's universe is just a simulation for an MMORPG played by outsiders in the 4th dimension.
Narm: The English voice acting is of... mixed quality, to say the least. While the acting for the main party is generally solid, characters like Farleen are practically inaudible. Combined with the strange movements with the character models, watching the game becomes a very surreal experience.
Nel's subordinate Farleen, but only in the English version and only because of her voice. Listening to her speak would have you swear that the air of Elicoor II was full of helium.
Adray is considered by many to be an unnecessary addition to the Director's Cut/overseas versions. This is due to him being (barely) shoehorned into the plot and is forced into your party, which prevents you from recruiting all of the characters that you want. His subpar and overall awkward combat performance also earns him a lot of hate. The fact that he joins you instead of the actually important fan favorite Clair only makes things worse.
Roger is disliked for being a Bratty Half-Pint and being completely useless in battles. His only saving grace is once you're forced to choose who you want to permanently join your final party, he's usually the first and easiest choice to leave out.
Shocking Swerve: If you've played it, or even read a few spoilers, you'll know.
That One Boss: Super Blair. If you've never used the 'No Guard' support skill, she'll gladly show you just how brokenit can be. As seen, she can attack and pursue you relentlessly, even while being hit by all 3 of your party members at once. Made worse, since she counts as one of the game's 5 Super Bosses. Plus, "Eddy of Light" has faster start-up and covers a much wider area, than Pseudo Blair's version of it, and it'll kill anyone caught in the center of it. Expect to revive your teammates often.
That One Sidequest: Recruiting all of the inventors thanks to massive amounts of Guide Dangit. Some of them will join you for money, but others require certain items that have to be either crafted (which may require specific other inventors) or found throughout the game in obscure out of the way places. In particular, the Bent Mystical Sword needed to recruit Boyd, the game's best Smith requires you to participate in the Bunny races in Gemity, which are basically totally random.
They Changed It, Now It Sucks: Many fans of the series, especially of The Second Story, hate Till the End of Time for the changes it made to the item creation system and other aspects, besides the infamous plot twist. Most of the hate is not because of the changes but rather the new systems are unwieldy, overly dependent on randomness, insanely expensive, and very frustrating.
The infamous plot twist was wasted; it might have fared much better if it was used for something else. Such as having an ally turn out to be a player character mole or examining the impact common MMORPG behavior would actually have on its universe.
Peppita mentions not having her father, but that he isn't dead. Her father is hinted to be Commodore Whitcomb of the Aquaelie, given that they each have one gold hoop earring apiece. But nothing comes of it when the two of them meet.
Uncanny Valley: The character models are all very high quality and look great compared to other games on the same system, but their movements are just so distinctly off at all times that everything generally looks weird.