Squall: 'I dreamt I was a moron...'

Zell: 'I just told him to hand it over.'

Siefer: 'Save those words (good luck) to a student that really needs them, eh?'
Quistis: 'Ok, then. Good luck, Siefer.'

Now the best quote in the whole game, when you ask Dr. Odine to play cards:

'Vant to play?'

That just cracked me up for like 2 hours.