Oh what a good question!
Well, humming the opening chords to Beethoven's 3rd symphony always makes me happy, as well as the second movement from his 9th.
On the other hand, if I were to choose a theme song of my life, it would be either Glenn Miller's "Moonlight Serenade", Louis Armstrong's "I'm Not Rough", Miles Davis's "So What?", The Beatles "A Day in Life" or anything by the Beatles for that matter, and a hundred other popular 60's songs from my childhood.
But in fact the one that trumps all is the zither theme from "The Third Man"
What's your favorite word?

