After reading this thread, I went and checked out some harmonicas on Amazon. And went to Youtube to hear a few played (by people who know how to play well!)

I have to say,the harmonica is just not for me. Everyone has personal preferences, but I just don't care for the way they sound.

Mark_R mentioned an ocarina. Those sound much more pleasing to my ear (not the high pitched ones, I think "tenor" or lower sounds better).

Now I think I may have to go investigate buying an ocarina. I was thinking of learning the pan flute a while back, but an ocarina would be much smaller and easier to carry around.