Wow-that's a tough one. I think though, I have a tendency to like the ones that don't get played over and over-like:

"If I Needed Someone"-I don't know-the harmonies in this song just kill me.

"I'm Looking Through You"-great angsty song,and again, wonderful harmonies.

"Hey Bulldog" Wonderful, edgy John craziness. Harbinger of things to come.

"Paperback Writer"- A song I always have to turn up. Guitar breaks are just the bomb.

Man-too tough.

Mine is While My Guitar Gently Weeps. It's not very Beatle-y but I do love it.