Let's see - regarding importing one tune file: It simply should not matter how I do it. What matters to me is that Media Center "handles" what I import in an "organized" way.
But you're not thinking about organization at all. This "one file here, one file there" approach is a recipe for disorganization. Consider this: When you eventually move all of your music to a new computer, or a new disk, or both, how will you locate it? Sure, MC will know about every file and where it is, but how will you find it externally to actually move it?
In my case, I copy two or three directories, to the new disk and I'm done. If you have files scattered all over your disk, mixed in with other stuff that *isn't* the music you care about, it's just not easy to maintain.
I'm not here to preach though. I won't argue with you if you don't see any advantage to organization on disk.
Brian.