Pink Floyd is easily the band/artist I have been listening to the most the past two years.
Recently heard this for the first time a week ago and I think it rules:
http://www.youtube.com/watch?v=ijUCwQru9is
I have been finding myself listening to DSOTM, The Wall, Animals, Shine On.., over and over recently, but they have so many cool albums, live stuff too. You sort of zone out and time flies by when listening to them. Helps a lot if you have a boring desk job, put on your head phones and just shut everything out lol.