This is starting to become a problem for me in Fallout 4. I have no issue with the return of previous radio songs as I loved all of them from Fallout 3 and never got tired of hearing them. But there are a few new songs that I lead to me instantly turning off the radio the second I hear them. Though overall, I find most of the new songs they brought on were great additions. I'm always happy to hear more of Nat King Cole. But the next time I have to hear "Right Behind You Baby" or one of the songs having to do with uranium or whatever, I'm going to snap.
As for the ambient soundtrack. I like it well enough, more so over Fallout 3 for that matter. But overall, I still prefer the music of New Vegas, both that from Inon Zur and of the original game's soundtrack brought back and reused. https://www.youtube.com/watch?v=KlUkvrYtWRk