I am more a fan of their writing than their sound. In part you can judge the impact of a group by how many artists cover their songs. "Let It Be" is my favorite, and I also like "The Long and Winding Road," "Come Together," and "Yesterday." I've also traveled to Abbey Road Studios in London and signed the wall to show respect...HA HA!
"The best kind of pride is that which compels a man to do his best when no one is watching."