I can't vote because when I listen to their music my preferences changes from time to time. A few months ago I was heavily into songs like I am the warlus, Strawberry fields, Here comes the sun & Lucy in the sky, but right now I'm listening again to their earlier stuff. But basically there are songs that I've always liked despite my mood.
In the last months these were the songs I listened a lot:
John's songs: Strawberry fields forever, I am the warlus, Tomorrow never knows, A hard day's night, And your bird can sing, Help!, Norwegian Wood
Paul: Got to get you into my life, Can't buy me love, Get back, Let it be, Hey Jude
George: Something, Here comes the sun, Taxman
Ringo: Octopus' garden
I remember there was a time when one of the songs I listened a lot were Lovely Rita and Fixing a hole.