I like it too. When I get sick of it, I just mute it and play something else from my music collection.
It amazes me that the most some people ever contribute to the SUGGESTION forum are comments shooting down someone else's ideas. I agree, more music would be nice. Also, sound effects tied to certain announcements. I'm sure Toady intends to add them, because regardless what some people think he does care about the user's experience and the UI. He just doesn't think its a good use of time to overhaul it right now.
Well, I guess I'll have to explain why I don't like this suggestion.
When I take a look at a suggestion, I don't just think about how cool would it be in the game. I think about the days which will be spent implementing it. I want multithreading but I don't want Toady to just stop everything and start rebuilding the game for multithreading. Do I want different music? Maybe after like 10 years when Toady gets to the unimportant stuff and fleshes the game out. This is a huge game and eventually even our wildest dreams will take place in DF. For now, what we need is bugfixes and gameplay features.
Things like UI, graphics and music aren't a priority right now. Modders handle that stuff. Can modders handle the source code, add features, fix bugs? Yeah there are mods which add interesting features to the game but I rather have the dev working on it. Music and tilesets? That's the job of the community.
Don't forget that Toady is just one man. Also, programming a game, adding music for it, and making the graphics are very different things.
Edit note: I'm not a developer and I don't know crap about the programming stuff. I just make assumptions.