The Beatles have produced some of the most timeless compositions and the majesty of Lennon & McCartney is awe inspiring. From the early pop releases like 'All My Loving' to the swirling psychedelic of hits like 'Tomorrow never knows' and 'Revolution 9' I can't think of any set of musicians who were as popular in their time as the Beatles.

But aside from popularity, their contribution to Rock & Roll cannot even be determined. From inventive new studio ideas (ie. John Lennon stumbling on playing tape in reverse while stoned) to pioneering string instrumentation in contemporary pop music.

Personally my favorite Beatles era would have to be 1965-1968.

Rubber Soul is a collection of great catchy melodic songs. I am definitely a fan of Lennons' songwriting in comparison to McCartneys', personally I think Johns' compositions lend to the psychedelic aficionado such as myself. I have a copy of this on vinyl for personal enjoyment.

Revolver, Magical Mystery Tour, the White Album. All pieces of history.

Thats my opinion.