You have my sympathy. Sometimes the wrong music can grate. I've never cared for any of the music tracks on Space Mountain, for example, nor the fact of it even *having* a music track (space is silent). And that's only a few minutes, let alone the two hours you waited in line.
Annoying queue music? The Matterhorn's endless yodelling comes to mind (which I think is gone now), as well as Mad Tea Party's continuous loop of "A Very Merry Unbirthday" on the tootiest woodwinds they could find.
Honorable mention goes to Magic Mountain's Riddler's Revenge's techno loop, which to the uninitiated sounds like the same few seconds repeated infinitely.