Tainted Ideals/YMMV

Fate/Stay Night Fanfic

Crowning Moment of Funny: Shirou all but calling Rin fat and telling her over-eating is a bad habit.
Fridge Horror: Literally, Shirou's fridge.
Game Breaker: As ever, a properly supplied Arturia - in this case by the prana-machine that is Ilya - is ready to stomp all comers.
High Octane Nightmare Fuel: Shirou's familiars - at least the ones he used against Constantin. Tyranids could learn a few things from this Shirou.
- Assassin's curse also results in a nightmare fuel-like effect.
I Knew It!: Stormedge guessed Assassin's canon personality months before Fate/Apocrypha was published. It's not an exact match, but it's very close.
- Almost the entire fanbase quickly deduced Assassin's identity from the mentions of Whitechapel during her POV sequences.
Moe: Assassin. Huddled beside Shirou in bed. Hnngh.
Tear Jerker: Kiritsugu and Ilya. Arugably more so than in canon Fate/Zero.

Emiya Kiritsugu left four things to his daughter. A battered gun. A handful of bullets. An old sheath. And a way of life that had destroyed him.
She thought they were the best presents he'd ever given her.

True Neutral: Shirou's alignment according to Word of God.