I did the same thing. Gilgamesh owned my ass so many times. I was psyched when I first saw him. It's the first time that you got to fight him since FF V I believe.
I really like FF XII. And on the topic of character designs - I really like the character designs for FF XII a lot. Now the character development was a bit lacking, but I think the game made up for it with its' massively expansive environment, bounty hunts, and overall fun-ness.
Does anyone know if XIII's battle system is gonna be like XII's or like the decrepit battle system of old FF's?