Bands who have released one of your favourite songs EVER but whose other stuff you couldn't care less about
Or perhaps a less awkward phrasing of the question. Name the song and band.
For me, it's Stars- Your Ex Lover Is Dead. Absolutely brilliant, wonderful, lovely, clever etc song which would very easily make it into any sort of favourite lists I might put together if so inclined, but I'm very unmoved by everything else of theirs.