We've talked about this in previous entries but in GalCiv II you play as any of 10 races and depending on which race you pick the AI will choose different dialog to talk to you with. Moreover, depending on your ethical alignment and their ethical alignment you will get different variations. There's plenty of "generic" dialog in there as well but there are pages and pages of unique dialog that only show up if you play as the right race.
So tonight I was playing as the Drengin Empire -- the evil scum of the galaxy. The humans had this to say: