So...this thread is just "favorite lines in the game?"

Cool.

Seifer: This is the scene where you swear undying hatred for me! The tale of the evil mercenary vs. the sorceress knight... The fun's just started, Squall. Don't disappoint me now!

I like how Seifer is convinced he's the real hero of the game.

On a more somber note, I felt really bad about beating up Seifer on my current playthrough.

Just look at the poor guy.
FINAL FANTASY VIII - (Edea & Seifer Boss PT. 2) Balamb Garden vs. Galbadia Garden Part 6 - YouTube

And then his dialogue:
"I'm the sorceress' knight. You'll never...get past me."
"I can't afford to lose."

All this while he can barely stand. And when he can't take anymore-
"Damn, I'm disgraced."

He falls over in a crumpled heap of broken dreams and shattered confidence.