What is Tom Waits' most quintessential song?

Imagine someone gives you one song and one song only to convince them of Tom's greatness. Which would you choose and why? Also, do you remember your first Waits' song that reeled you in?

I'd choose Blue Valentines off Blue Valentine (1978). The melancholy and paranoia are high in this one and there's a nice little guitar solo thrown in there as well.

My first Tom song was "Goin' Out West." Heard it as an uncredited track for the movie Fight Club.