I haven't played any of the older games, but yeah, the NL soundtrack gets kind of old... Especially when it sounds a little too similar to other game soundtracks. Everything else is great, but the music is kinda meh.
I miss the original much much much more I have to say. Also wish I never would have made my town "Civilized" and left it as more of a forest like the original games for that extra charm ^_^ It just doesnt feel the same anymore...
I really miss the old soundtracks...I remember waking up and playing Wild World all day <3 Now I can't live the nostalgia anymore, only in my mind, because I just can't become addicted again since New Leaf released. </3
However, I think the older games have better The Roost theme though. In NL it doesn't sound as relaxing as the WW/CF, because they changed the good ol' piano into acoustic guitar.