I've always thought that
There's A Place was a really under appreciated piece, I think it's sort of the first hint of lyrics beyond the usual 'I/she/he loves you' etc. type of lyrics. Pretty sure John wrote it. It is kind of hard to say any Beatles recording is under appreciated when even their most trivial things get heard by millions more than some other artists' best (not that this would be in any way the fault of the Fab ones). Also, I grew up with this as a b-side on a Capitol records orange and yellow swirl single. That harmonica riff is so haunting!
Another personal fixation is the instrumental
Flying from the Magical Mystery Tour. I like it so much I tracked down all the alternate takes of it and burned them all on one CD-R. Mind you I've done other daft things like put every version of Walk Don't Run I could find on one as well, even a crazy 'vocal' version by 'The Marty Cooper Clan'.
