Here are some more:

Selphie: "Bus Bus ride ride ride. I LOVE BUSES MORE THAN TRAINS!"
Seifer: "Squall, buddy, let's not fight. Let's all hold hands and sing by the camp fire."
Irvine: "You want me to shoot Edea? Okay!" *Fires*
Rinoa: "Seifer is so much better than Squall."
Laguna: "Lu--Squall I am your father."
Kiros: "You are so brave, Laguna! I envy youuu!"
Laguna: "Wow, we're not lost. Commence the celebration!"
Zell: "Why do I suck so much?"
Squall: "Come here, Quistis, I want to talk to you."
Quistis: *Starts talking to a wall*
Seifer: "Ohhh a doggy! Can I pet it mommy please?"