A few years ago I saw on VH1 where they asked like 100 different musicians( such as Tom Petty, James Hetfield, Britanny Spears, etc.) what the best rock song ever written was and In My Life was #1. Nothing fancy, it's short and simple yet manages to convey so much. I forgot who said it but they commented that it was "simply the perfect song". I think Lennon's Imagine was #2

My Favorites would be
In My Life
Elanor Rigby
Another Day in the Life
Lucy in the Sky
And I Love Her

Damn, it's too hard to go on...just too many