I agree, all they needed was like, 10 more sound files of people from different factions saying SOMETHING ELSE. I actually did a Powder Ganger Quest, the Gecko Clearing one in the Vault, and it was refreshing to hear the different sound bites they have. Why not add this to others as well? I swear the NCR are the worst offenders for repetition.
Especially as you would spend so much time with them. It seems the enemies got all the good lines and your friends are all dumb. Well, the companions do have some interesting conversations from time to time.