I love the emotion in it. It's so simple, but you can feel the lyrics.

I remember hearing about a song that Paul or John sang for an entire week prior to recording, in order to his voice a really raw been-playing-in-clubs-every-night sound. I forgot which one it was, though. I assumed it was something like I'm So Tired, but does anyone know which song that was?

I think if John sang Yr Blues or if Paul sang Why Don't We Do It In The Road for a week, it would give that effect.

That was my second choice.....then Glass Onion.

right on!!!
 

I think the same thing. A tough choice with those 10. Only obladioblada wasn't in the running.

But I've always been a big John fan and those are two of his knockout best.

The Sun Is Up
The Sky Is Blue
It's Beautiful
And So Are You

Dear Prudence, Won't you come out to play...

Breathtakingly simple. Transcends time.

from abbey road
 

I think you are referring to "Oh Darling" from the Abbey Road album. Sung by Paul early one morning or late one night before he could get the sleep out of his voice.

Also, similar technique used when John sang "Twist and Shout". They had been recording for a week and John's voice was spent. They needed one more song for the album and choose the live staple "Twist & Shout". They cut it in one, live take, and the rest is Ferris Buehler history.