[quote=@JohnWolff]
[quote=@arowne97]
aw dangit. Because since this isn't that shitty era that Fate/Stay Night was in, I was hoping I could control a better-attitude Gil. >.>
[/quote]
I've never understood that part about the Big Gilg. -.- Why is he not a douche in different eras again? 'Coz I want an asshole-Gilg in the RP. :P
[/quote]

His personality is determined by the Era in which he's summoned into. The era of Fate/Zero and Fate/Stay Night was really shitty, so he had an asshole-ish attitude. In Fate/Extra CCC, he was content with the way the world was, so he was nicer. Nasu wanted to show that there was more to Gil's personality than just his arrogance and asshole-ness.