For me the best new experience listening to mono versions is the white album.
I think in particular George's songs benefit the most.
"I'm so Tired" is awesome in mono. Pauls backing vocals are now loud,
and give you chills the 1st time.
"Piggies" is more interesting now. The vocals are clear, the background noises are LOUD.
It's somewhat scary if you imagine the Manson family sitting around listening to this song.
"Savoy Truffle" - This song may not be one you come back to often, but here is a track that shines in mono. You can now pick out all of the Beatle's voices. While not as clear and stunning as the I'm so Tired bit, the vocal difference is big. I can hear George's guide vocal along with the his more powerful lead. John's voice also rising above the background harmonies that were once buried in stereo. It's as if the songs are coming alive in a whole new way.
"Long, Long, Long" - The highlight here for me was Ringo's drums. This song just sounds so beautiful and full overall in mono. Paul is right in the room with you on those background vocals
"The Continuing Story of Bungalow Bill" - John Lennon's vocals are beautiful on this mono version. So clear and powerful. He must surely still be alive. Paul's bass stands out all over the remasters, and here is another track is partically shines.
"Helter Skelter" - This track is even more powerful now. Paul's vocals are clear and powerful like John in Bungalow Bill. Everything is so clear and in focus here. The background vocals are now
clear and effective. Along with just the overal quality impressive, you are hearing things in the background vocals that were buried before.
"It's All Too Much" was a fun fresh experience on mono as well. The song just flat out grooves/rocks.
"Lucy in the Sky with Diamonds" - The vocals and feel feel different that the stereo version.
I think in general I wanted a new listening experience. Something fresh, and exciting.
didn't really get that from the stereo remasters, but the mono is a different story.
To some the question is which is better the mono or stereo.
To me the mono are different more than better, so it's more interesting to hear them now.
In the long run I think the stereo version will win out on most tracks, but there
are still some songs that will always sound better in mono. The White Album and Sgt. Peppers especially.