Speaking of music though, I think it was really disappointing that they used the music from FO3 in the Brotherhood bunker. Not only is that piece of music quite boring but it would seem to me that it would make more sense to have the music associated with the Western Brotherhood in a location where you find... well, the Western Brotherhood!
I was thinking that as well. They used Metallic Monks for the freaking gate into the New Vegas Strip, but not for the Hidden Valley bunker? I'm also wondering why Followers Credo wasn't used for the Old Mormon Fort. I actually associate that piece more with the Enclave than I do the Followers, but it
was their theme in the first game.
The ambient music placement could have been better in general. I've found that the developers placed Fallout 1/2 music in places where it didn't really fit the mood. The music from The Glow was used for the Lucky 38 suite for example. Now I don't think I need to point out how music crafted specifically for a dark, irradiated dungeon doesn't exactly go well with the ambiance of a luxurious apartment suite. It's comparable to throwing dark metal in the background of a Hello Kitty episode.