Agaetis Byrjun - Sigur Ros, although I do come back to it most years at some point.

One of the joys of spotify (for old folk like me) is you can go back and listen to stuff you only ever had on long lost, or in the loft and not coming back, vinyl or cassettes. I put Big Country's The Crossing on the other day. Chance is just the perfect miserable Scotland in the early 80s song.