I honesttly thought the atmospheric textures in "Sunday Morning" were crafted so well and make quite a difference to the overall mood of the track.
I'm talking about the distant keys and the reverb drenched vocal fx. This of course gave the track a much more of a 'spacey' feel. Something which can't escape mention is the wonderful drum programming. There's a lot going on particularly with the percussion, but not to the point where it's chaos - it's pretty much controlled. This isn't such suitable for a Sunday morning, the dense moodiness throughout the track is bound to have an impact on you any day of the week!