Hi, Erica! I think that, overall, it's the way the songs stack up for me - I tend to be a little bit more of a "song" person. The unique exception is the White Album, which I like for its stylistic variety but less so for individual songs. Revolver is my #1 because it has great songs AND stylistic innovation.
It was difficult to rank the albums, but easy to remember the songs because they're so ingrained in my consciousness. I've been a Beatles nut all of my life!
