The first few seconds of a song will usually a) rub me right or b) incite 'next', depending on my mood.
Then there are those nights where a long trip home is accompanied by good music no matter what song comes on. You can sink into the sound happily because you get past your 'mood' and feel energy on any and all levels. Ride it.
So, on nights like these, some songs get their shining moments to become 'that song', until the next one comes around...
Last night this played, and then 2:38 gets up in your face and says "HEY! HOLY @*#& aren't I good?"