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 one in The League of Gentlemen finale. I'm not going to spoil it, because - even though this trope was fully in place and it was obviously the same actor - it still comes as a surprise. ~ Man Without A Body
The Spy class in Team Fortress 2. You are indistinguishable from the real person in the eyes of your enemy, but to your own team you literally appear to wear nothing more than a paper mask. ~Katuko
By this point, it probably has. Target demographic: Female Age 5-12. Periphery demographics: Male Age 13-18, Male Age 18-30, Female Age 18-30
Eeyup ~ atrasicarius
And before the ponies ruled the earth, this category pretty much belonged to Animaniacs. Not many kids' shows have open houses for their (primarily teenage and adult) Internet fans, even now. ~ lee4hmz, Redhed311
Pimped-Out Car: The DeLorean DMC-12 from Back to the Future. It's so cool looking that many DeLorean owners have taken to modifying their cars to look like the one from the movie. There's even a niche market where you can pay to have it done for you. ~mysterykcad
Post Modernism: This very wiki. It's a wiki about fiction and recurring themes in fiction. Heck, we're so post modern we have a page about post modernism, and we're on a page of our favorite usage of types of tropes and the choice for favorite usage of Post Modernism was the wiki itself.Yeah... — Creekery
There's an even better one than that: Steven Moffat, the head writer. In his own words, "My entire career has been a secret plan to get this job. I applied before but I got knocked back 'cos the BBC wanted someone else. Also, I was seven." ~ IJustWannaBeGod, Me2
Eli Roth. Watch him interviewed, it's clear he's still amazed gets to make horror movies for a living. — Cuchulainn
Ancient Mew may be the current image on the site, but in more recent memory, The Pokemon Company made a promotional card that is literally powerless, useless, and an absolute piece of garbage in an actual game. This card, the "#X Trainer Card," which is distributed to only the First, Second, and Third place finishers at the World Championships, has no impact on the game state AT ALL. Nevertheless, it sells every year for at least $7,000.
Mononoke A collection of stories where spirits fused to negative human feelings are exorcized by exploring the minds of these spirits and of the nearby humans, with multiple Rashomon-esque layers and twists ~Legion
Sluggy Freelance, "The Sluggite Koan". Bun-bun is soBad Ass the author really ends up with a broken arm after the encounter. Not just in the story, that is. Of course it's really a Retcon for unknown Real Life events, but still... - VVK
Steel Battalion takes the cake-not just because of the huge controller, but the way the Vertical Tanks move. They actually FEEL like gigantic, heavy, walking gun platforms of destruction, and being able to outmanuever the enemy and not get hit is the key to victory. It really has to be played to be believed. ~ NamelessFragger
The Armored Fighting Walkers of Ring Of Red. They are the very definition of tanks with legs; need a crew to load the shells, a supporting crew in the ground and are suitable for only one kind of terrain. ~ Not JM Keynes
In the A&E version of The Way We Live Now, Melmotte tries one of these on Mr. Alfe, but it gets hijacked towards the end, with glorious results: "What you say would be a fair criticism, if you really did move mountains. But from what I can see, all you move is money. From the pockets of other men into your own." ~ Man Without A Body
"Thought about what you said to me the other day, about my painting. Stayed up half the night thinking about it. Something occurred to me, I fell into a deep, peaceful sleep, and I haven't thought about you since. You know what occurred to me? You're just a kid. You don't have the faintest idea what you're talking about. You've never been out of Boston. So if I asked you about art, you'd probably give me the skinny on every art book ever written. Michelangelo: you'd know a lot about him — life's work, political aspirations, him and the Pope, sexual orientation, the whole works, right? I'll bet you can't tell me what it smells like in the Sistene Chapel. You've never actually stood there and looked up at that beautiful ceiling and seen that. If I ask you about beautiful women, you'd probably give me a syllabus of your personal favorites. You may even have been laid a few times. But you can't tell me what if feels like to wake up next to a woman and feel truly happy. You're a tough kid. I ask you about war you'd probably, uh, throw Shakespeare at me, right? 'Once more into the breach, dear friends.' But you've never been near one. You've never held your best friend's head in your lap and watched him gasp his last breath looking to you for help. I ask you about love, you'd probably quote me a sonnet. But you've never looked at a woman and been totally vulnerable. Known someone who could level you with her eyes. Feeling like God put an angel on earth just for you, who could rescue you from the depths of hell. And you wouldn't know what it's like to be her angel. To have that love for her be there forever, through anything. Through cancer. And you wouldn't know about sleeping sitting up in a hospital room for two months holding her hand because the doctors could see in your eyes that the terms 'visiting hours' don't apply to you. You don't know about real loss, because that only occurs when you love something more than you love yourself. I doubt you've ever dared to love anybody that much. I look at you, I don't see an intelligent, confident man. I see a cocky, scared shitless kid. But you're a genius, Will. No one denies that. No one could possibly understand the depths of you. But you presumed to know everything about me because you saw a painting of mine and you ripped my fucking life apart. You're an orphan, right? Do you think I would know the first thing about how hard your life has been, how you feel, who you are, because I've read "Oliver Twist"? Does that encapsulate you? Personally, I don't give a shit about that because I can't learn anything about you I can't read in some fucking book unless you want to talk about you, who you are. And I'm fascinated. I'm in. But you don't want to do that, do you, sport? You're terrified of what you might say."
Ben 10, although maybe Alien Force outranks it since the writers deliberately try to fix what they fumbled but fail spectacularly. ~ Lale
Star Trek: The Original Series. Kirk and Spock. Full stop. Unless, of course, they were written as in love with each other in the first place, which is... unlikely. ~ AcrossTheStars
Sora/Kairi is totally obvious but not official, and Sora is happy to see her when they reunite in Kingdom Hearts II, yet immediately after, Sora sees Riku and proceeds to fall to his knees, grab his hand and cry. ~ sardns
The Legend of Zelda series. Go to three temples and collect three artifacts. Oh look, a boss. Just expose its weak spot three times to kill it. Hooray, you've earned some exposition: the universe was created by three goddesses, and the baddie is after the Triforce. ~ Progeny Ex Machina
How I Met Your Mother has one of the longest lists ever, but the most well known has got to be "LEGEN - wait for it, and I hope you're not lactose-intolerant because the second half of that word is - DARY!" ~ Voodoo Child