My favorite quotes are:

"To be forgotten is worse than death." from Freya of FF9

"If you're joking that's cruel, but if you're being sarcastic, that's even worse!" from Duo Maxwell of the Gundam Wing movie, Endless Watlz

"From when I was born 'til the day I die, the only side I'm on is mine!" from Son Goku of the Saiyuki anime series.

I really love these quotes for some reason, and sometimes use them in my sigs on forum sites.