Should play everytime the LOG line gets a point.
I like the current song, and now that we appear to be in a better place it will be even better. It invokes emotion from fans and players, good or bad, that's what you want.
That said I'm also a fan of having different songs for different goals or different scorers. Seems like it would show the players personality a bit more Reinhart scores "let me clear my throat" comes on, Okposo score and it's "the sound of silence". Come on, how awesome would it be if Eichel scores his 30th goal and C.R.E.A.M. by Wu Tang comes out of the speakers?