Back to guitarist Joe Satriani for a little bit. . .
On his 2008 album, "Professor Satchafunkilus And The Musterion Of Rock," Satch has a song called "Overdriver." I think it's a great tune. It has a neat groove and is fun to listen to.
In the following video clip he describes the origin of this song. He was thinking of a particular childhood memory as he composed this. It's quite intriguing. It has to do with coloring. (his explanation is in the first minute; the second minute is just a partial audio excerpt from the song along with a photo slideshow)
And in this next video he plays the whole song at a clinic for guitar players. Before he performs the song, he describes some of the musical details about the song, and a little about the pedals he uses. You can see from this how much careful thought goes into composing music. There are various layers of structure and organization that makes it all come together in an interesting and pleasing way. I find it very interesting to get some insight into how a great musician like this thinks about one of his compositions. If you just want to skip right to the song, go to 4:10 in the video.