In this article I'm going to list adjectives describing Captain Swan and then name 5 scenes or moments which I think fit the description.

Hot
1. The sofa kiss in season 6.
2. The kitchen kiss in season 6.
3. The Neverland kiss.
4. The kiss at the end of their first date.
5. Killian tying the scarf bandage with his teeth.

Cute
1. Dancing together in Snow Drifts.
2. Their first date.
3. The horse ride and the kiss in the middlemist meadow.
4. Killian reminding Emma of her story to restore her confidence.
5. Emma asking Killian to move in with her.

Tragic
1. Saying goodbye in the Underworld.
2. Killian's death scene in Swan Song.
3. Killian's alternate reality death scene in Operation Mongoose Part 2.
4. Being separated in season 6.
5. Killian's confession/goodbye message in Smash The Mirror.

Protective
1. Emma going to the Underworld to save Killian.
2. Emma turning Killian into a Dark One because she couldn't let him die.
3. Emma giving Killian CPR even though she knew that she would lose her magic.
4. "I'd follow her to the end of the world, or time."
5. "Emma, I can tell that your heart is uneasy. And it's my job - well, I hope it's my job - to protect your heart, even when no one is physically trying to steal it."

Flirty
1. Distracting Past Hook.
2. Teaching Deckhand Hook to swordfight in Operation Mongoose.
3. "You couldn't handle it." "Maybe you're the one who couldn't handle it."
4. "Don't think I'm taking my eyes off you for a second." "I would despair if you did."
5. "Hey beautiful."

Endgame
1. Passing the Underworld test to access the ambrosia plant.
2. Reuniting using the pixie plant in Awake.
3. Their wedding.
4. "Wait, if you're afraid of losing your happy ending, that means you've found it. What is it?" "Don't you know, Emma? It's you."
5. Killian being the one to find Emma and bring her back to Storybrooke during season 3.