Hmm, let me think a bit.. Rock: Deep Purple/Machine Head, Grand Funk Railroad/Survival, Pink Floyd/Dark Side of the Moon, Eric Burdon/pick one, The Yardbirds/pick a song or guitarist.
But then, depending on my mood, I might listen to the following:
Commander Cody and the Lost Planet Airmen
New Riders of the Purple Sage
Will the Circle Be Unbroken
Johnathan Edwards
Wagner
Charlie Pride
Buddy Holly
Sting (with Branford Marsalis)
Cusco
Last of the Mohicon soundtrack
Anything but rap.