Hmm. My absolute favorite song when I was really little, say 5 or 6, was #112, "Then They Will Know." (Must've been some ironic foreshadowing...) My mom says I once started singing it really loud in the middle of a grocery store, and everyone looked at me kinda funny.
But once you get past the stage where singing songs loud is fun because you get to see how many people in the rows ahead of you will turn around and look at who's singing so loudly (and, perchance, a tad bit out of key), the songs overwhelmingly underwhelm. The first time I ever went to a non-witness service, however much I still had some residual discomfort from being in a (gasp) church, I was quite impressed by the music, as well as by the fact that there was quite a bit more of it in proportion to sermon time.
My never-witness boyfriend and I looked through a song book once and he, knowing a little bit a music, pointed out how simplistic and repetitive most of the songs were from a technical point of view - something, of course, that I had figured out from years of listening to them. There's so many of them that just all sound the same, aren't there?