The Beatles are probably still my favorite band of all time. Besides writing and performing great tunes, they defined an era in western culture. An examination of the musical transitions the band underwent from 1962 to 1972 clearly shows that this was a band that was never content to rest comfortably on the (unprecedented) success they had achieved. They were always pushing forward, trying new things.
So, in the interest of Friday fun, I invite you to take part in my Beatles poll.