Good question...so many for so many reasons/times/occurrences.
1. You Never Give Me Your Money (Abbey Road): The switch at minute 1:31 takes the song a bit deeper, 2:10 is amazing, and @2:47 - wow - I don't know why but I feel like I'm flying when I hear that drop. This song was the "soundtrack" running in my head for a long time, when finding freedom from things that were holding me back from enjoying life.
2. Tomorrow Never Knows (Revolver): Having the sitar in their music was genius, but recording it backward for this song - SO ahead of their time. "Lay down all thought, surrender to the void", such powerful words, such a challenge for us Aspies too (for me at least)!
3. Norwegian Wood (Rubber Soul): My childhood favorite, my first introduction to the sitar (an obsession), which lead me to a major respect and adoration for classical Indian music.
There are way too many to list! :0)