Not a music buff since a decade past but I have them to try and make me feel connected with mainstream today. Both soundtracks are what's on when I'm cleaning. Usually by then end of both I'm all done! I almost use them as a timer to make sure I'm on track with the tracks!
Seen both movies, read the series. Liked listening to the New Moon soundtrack before the movie came out to try and match what song they would play in what scene (having read the books). I like the first soundtrack best because you can dance to it more and, like Amanda, I am surprised to find I like both R. P.s additions.