This is simply what you think is the (not some of the, the) best example of any trope (an objective trope, not subjective, since this already is subjective). The "Crowning Example" if you will.
There could be several reasons you think an example is the best.
You think it's the best in terms of illustrating the trope.
You think it's the most well done.
It's your favorite play in that trope.
You just really like the source material.
Oh, several things before you list examples:
Each troper gets one example per trope, no more.
Don't go "no, this is," or phrases like that. This is about our own personal favorites.
The real Dr. Alexander J. Mercer. There are just not enough levels of sociopathic spite to define this guy. He was perfectly willing to destroy his company, his ex, his sister, the entire city, and (worst case scenario) the entire human race to get back at the guys who killed him. ~ Liangnui, Unclouded TJ
"Uncle, I know you must have mixed feelings about seeing me. But I want you to know I am so, so, sorry, Uncle. I am so sorry and ashamed of what I did. I don’t know how I can ever make it up to you. But I’ll—" ~ Lord Mortis
Angel Beats!, hands down. No other anime has managed to make this troper cry as much as this one, and the last few minutes of it tops all the previous episodes as the biggest tearjerker of all. ~Pink Hanabi
Black Beauty: The novel hits the reader with several, but Ginger's fate is the biggest. ~ Wyldchyld
Black Beauty: "A short time after this a cart with a dead horse in it passed our cab-stand. The head hung out of the cart-tail, the lifeless tongue was slowly dropping with blood; and the sunken eyes! But I can't speak of them, the sight was too dreadful. It was a chestnut horse with a long thin neck. I saw a white streak down the forehead. I believe it was Ginger; I hoped it was, for then her troubles would be over. Oh! If men were more merciful, they would shoot us before we came to such misery."
Hideaki Anno is the (in)famous creator of Neon Genesis Evangelion who is widely known for being a Master of theShrug of God and who chastised his fans for wanting answers handed to them on a silver platter; loves to tease his fanbase to almost the point of madness and seems to be set on taking this to an art form.
In Death Note, the death of L and Watari lead to a whole entire arc. Then at the end of the series there's Mello's death, which cements the last pieces of evidence to order to bring the series to an end. ~Chihuahua0
One Piece, Gold Roger. "You want my treasure? You can have it. I left everything I gathered together in one piece. Now you just have to find it!" And it launched the Golden Age Of Piracy. ~ DAN004
Code Geass. It takes some balls to seize control of the biggest superpower in the world, be purposefully the most evil possible in power, so that when you die in a teathrically arranged scene, the rest of the people can achieve world peace. - ElectricBoogaloo
And .hack//Quarantine has Tarvos, which usually takes at least half an hour to beat, constantly inflicts all negative statuses with one attack, and switches back and forth between being completely immune to physical attacks and being completely immune to magic. ~intothenight
Stage 15 from the first Castlevania. If you can somehow wade through all the axe knights and copious swarms of medusa heads without dying (I would like to remind you that by this point in the game four hits kills you, and the only health-increasing power up in this block was very far behind you), then you have Death himself to deal with at the end of the hall. He does go down easy with a quick swarm of spammed fire bombs, but in order to pull that off you have to carry that weapon all the way from almost the very beginning of the dungeon without either dying one single time or accidentally picking up another weapon. Again, four hits means death. Good luck, motherfucker. -Ziggy Zag
I've been playing video games for a long time and I've got quite a few of these vying for first place, but nothing has made more people I know utterly lose interest in finishing a game than that stupid turret sequence in Dead Space where you have to shoot through an asteroid field. It's boring, it's difficult, it's jarringly out of place in the game, it goes on for way too long and the asteroids look like meatballs. ~ Gfrequency
Frontier gets special mention for weaving most of the originals and the new songs into a 10 minute long tapestry of sound that plays during a climatic final battle in SPACE, and then they get dangerous.
I would nominate Saul from MARDEK He doesn't just refer to himself in third person; he refers to everything in third person, literally narrating outloud and spoken his life and the events around him as they are happening as if he was reading a book. ~ Bailoroc
"MISAKA would like to nominate herself," suggests MISAKA with a satisfied nod. ~intothenight
Outnumbered. Demonstrates the very purpose of The BBC doing SitComs- could you imagine a Big Five media conglomerate-owned commercial broadcaster letting so much money and effort ride on the improv skills of a four-year-old? ~ Nlpnt
In The Lord of the Rings a knife thrown at Viggo Mortensen is supposed to miss him. Instead it gets thrown towards him and he deflects it. - reub2000
The title character of the short story and one-volume manga Memories of Emanon, who — while physically normal — has accumulated memories passed down from parent to child literally since the beginning of life on Earth. (She quite clearly remembers the Edo period...and the Yayoi period...and the end of the last Ice Age...and the K-T extinction event...and the Cambrian explosion...and the oxygen catastrophe, though she might not have known it was happening at the time...) ~Shay Guy
Jorah Mormont: The common people pray for rain, healthy children, and a summer that never ends. It is no matter to them if the high lords play their game of thrones, so long as they are left in peace. They never are.
Too Kinky to Torture: Cheryl from Archer. There are too many reasons to list why she's perfect for this trope but the one that stands out the most was the time that she made Krieger build a robot to choke her because his hands are to small and despite almost being knocked out from the lack of oxygen she still wanted it to chock her. ~ 2heartgirl
Name a witch, any witch, from Umineko no Naku Koro ni, and you get this trope in all its magnificent glory. Special recognition goes to Beatrice, and later Bernkastel aka Trollkastel ~ Witch of Cicadas
Hazama/Yuuki Terumi... He's the trope pantheon god of trolling for a reason. Other characters aren't safe; players aren't safe; he, himself, isn't safe of his glorious trolling! It's been said before but I'll say it again: Trolling. Sustains. His. Existence. Feeding the troll keeps it alive... And that's still not the reason why he does it! ~ Zetta Toad