I'll have to say Rubber Soul, it was the first album that I bought along with Abbey Road. Although I love so many songs on Revolver, like Tomorrow Never Knows, Got to Get You Into My Life, and god, Here, There, and Everywhere is one of my favorite songs ever! I guess it's a really tough pick now. But Rubber Soul has some great ones too, I love I'm Looking Through You, that puts me in a great mood every time I hear it. I also love In My Life, Michelle, If I Needed Someone is one of my favorite George songs!