I remember when Sergeant Pepper came out. My parents bought me a mono version of it because we didn't have a stereo back then. Apparently those old mono LP's are hard to find and command a lot of money when you can find them in perfect shape. Too bad I didn't keep it...

the mono version has a better mix as well

I voted White Album. So much variety on one album. The next best is a tie between Sgt Pepper and Abbey Road. Revolver is IMO seriously overrated, I think it's one of their worst ones.

Now if I could count "Past Masters, Volume 2", which collects all the non-album singles of the second half of their career, that would hands down be their best album.

Abbey Road for me. It just seems to be their most exciting album. It's as if the Beatles wanted to go out with a bang, and they did!

Revolver is my favourite. To me, it's their most perfect, complete album from beginning to end. Abbey Road is a close second, but I obviously don't like it as much as Revolver.

My ranking:-

Revolver
Rubber Soul
Abbey Road
The White Album
With The Beatles
Sgt Pepper
Hard Day's Night
Magical Mystery Tour (UK version)
Help!
Yellow Submarine
Let It Be
Please Please Me
Beatles for Sale

Revolver > Abbey Road > Rubber Soul

In that order, according to me :)

Abbey Road for me, followed by Peppers and Revolver. Really dislike their first few though.

Gotta say Abbey Road, especially when one takes into consideration that it was their real final album.

And I feel it was a great finale, "Let It Be" was too somber for me, Abbey Road was all about Beatles' ability to create music with fairytale magic.

Also Abbey Road is tight as hell.