My fav quote was on one of the missions for the Caligula's Casino where you go through that burning building with Rosenburg(is that how you so spell it?)Well anyways, at the cutscene CJ talks to that guy that was stuck to a window and you drove around LS, then man breaks down when he sees CJ and CJ says,"MAN that n**** ****ed up."
I also like the one at Cluckin' Bell. When you go up to order the guy says random things, and my favorite was,"Cluckedy ****" That was the first line I ever heard after the mission, and I just bought the game and the volume was up. I was supprised no one went in my room.