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: Paper Mario: The Thousand-Year Door
8.8: Game Informer originally gave the game a 6.5. This would have been bad enough, but the reviewer's primary complaint? The writing was bad. The ensuing fan backlash actually prompted two letters of apology. The first one claimed that the reviewer gave the score not of his opinion, but guessing how well consumers would like it. This caused more complaints about the review, so a second apology letter was written with the exact opposite message.
Anticlimax Boss: Macho Grubba from Chapter 3. Despite having a whopping 60HP, which is massive for this point, considering the last boss only had 30HP and the next one will only have 40HP, he's still incredibly easy to beat. Although only if you do it quickly, as he uses his turns to buff himself up to monstrous levels.
Best Level Ever: The Glitz Pit in Chapter 3. Pretty much any Bowser segment.
Breather Level: The Excess Express in Chapter 6, for the most part. It's more puzzle-oriented than battle-oriented, but it does have a "dungeon" portion with some fairly tough enemies.
Complacent Gaming Syndrome: It seems to be the general opinion that if you even think of levelling up anything but Badge Points, then you're a complete idiot who doesn't know how to play the game properly. Even if you don't use Danger Mario, this is still considered the only way to play.
Fridge Brilliance: Defeating Bonus Boss Bonetail nets you a grand total of... one Star Point. Players will naturally rage at this... until realizing that this is the game's way of saying "You just beat the hardest enemy in the entire game. You don't need to level up anymore!"
Cortez's forms. First, a four-armed skeleton holding each of his weapons. Then, a hunched-over skeleton with some gem in the torso. And finally, his head and his weapons. Why do his forms progress like this? He's falling apart.
How come the impenetrable defenses of the Iron Cleft brothers never manage to get further than 10th place in the Glitz Pit? Because the guys directly above them are Spike Tops. Iron Cleft have unbeatable defenses, but only have an attack of 4, Spike Tops have a defense of 5.
However, one of the Iron Clefts explicitly states that their spikes can "penetrate any substance" (exact words), so it's Fridge Logic, really.
That's what he says but if you super guard you'll take no damage so it can't be true. There are attacks that can't be super guarded too(and thus, may really pierce through anything)
Also, while their spikes may certainly be capable of penetrating any substance, there's no indication that the Iron Clefs have trained enough to be able to produce the force necessary to do so.
Each time someone questions who got turned into a pig, they end up as the next victim. Ask not for whom the bell tolls, it tolls for thee.
At one point you must look behind a crate. You'll see a few of Mario's new friends lying on the ground, not moving. You can say they're stunned, until you see the flies.
The situation is somewhat helped by the fact that they react to Mario talking to them (one gasps out a warning, while the other gives a wordless response), proving that they're alive. And they both show up perfectly healthy at the end of the level. On the other hand, consider that they aren't the first fighters that have had their energy drained. They're rescued and Prince Mush (the other known victim) is found, but what if there were others?
In Rogueport, there seems to be some dried reddish-brown stuff on the ground. One could easily pass this off as dirt, until you realize that it's next to the gallows, and that it's found nowhere else in town...
Fridge Logic: Glitzville is presumably in the skies of the Mushroom Kingdom, yet pretty much nobody there recognizes Mario or Bowser!
Rogueport and the areas connected to it seem to take place in an area separate from the mainland of the Mushroom Kingdom; not everyone recognizes Mario. Jury's still out on Bowser.
Let's just say that there's a reason why the Rogueport citizens feel uneasy whenever they're near the Thousand-Year Door.
The bathroom in the Glitz Pit. Seriously, what the hell, Nintendo?
The tune that comes with X's e-mails (from the ice world in Super Mario Bros. 3)
The Shadow Queen is basically a nightmare incarnate. And when she actually makes an appearance in the story, the first thing that happens is the entire world is plunged into darkness. Instantly. It gets worse from there.
The 'victory' music that plays at the end of a battle and your partner has been knocked out. Ugh...
While exploring the unused rooms of Glitz Pit, finding the half-dead forms of two of your former opponents. It doesn't help that they were two of the nicest characters in the level.
Nightmare Retardant: Doopliss's abilities remain terrifying throughout Chapter 4, but that doesn't change the fact that the one responsible for the town's curse is a Bedsheet Ghost in a party hat and bowtie who is sitting in an easy chair watching TV when you first meet him.
Player Punch: Sir Grodus shutting TEC-XX down, if you really felt for TEC.
Seeing Doopliss possess Mario's body and running around pretending to be him, while the player is unable to do anything about it just yet or even return to Rogueport, can be a little jarring.
Magnus 2.0. He's got That One Attack where he sucks up the audience in a hose and rapid-fires them at you, dealing completely massive damage unless you can block correctly.
There's also Bowser's appearance out of nowhere in the Palace of Shadow, primarily because, Mario is probably on low health from the preceding battle with Grodus, and Bowser and Kammy have quite a bit of health for this battle.
The Scrappy: Flurrie is easily the least popular partner, which can mostly be attributed to her design and attacks.
They Wasted a Perfectly Good Plot: Jolene's brother and the Glitz Pit's first champion, Prince Mush. After you beat Grubba and the Crystal Star releases him, he could have been a good Bonus Boss along with Bonetail and the Atomic Boo. He was at one point intended to be a bonus boss... but instead, after the end of Chapter 3, you never see him again.
Jolene and Prince Mush certainly qualify too. Their family was poor, Mush disappeared as a result of Grubba's machine resulting in Jolene having to work for Grubba to find her brother and Jolene seems to be putting on a brave face the whole time. It helps that Jolene is popular with the fans.