I think what makes analog sound good is knowing how to use your equipment properly.
Same goes for digital.
It's a tool for an artist to use to their potential and skill as a musician and as an engineer.
You can have the world's highest end equipment and still make rotten recordings if you don't know what your doing.
Spend some time in the clinic and listen to what your fellow bbs'ers are doing with their equipment.
I have heard guys like B. Sabbath and others who perform pieces of art that transcend the medium they record on and make it irrelevant because they know what they're doing.
By the same opposite extreme, you can hear efforts done by many others with perfectly sound equipment turn out horrific crap.
The bottom line for me, that I have painfully come to realize is that owning a certain piece of gear that everyone rants and raves about is no guarantee that you will obtain critical acclaim by owning one yourself.
Don't get me wrong. I love my analog gear but I also know that the more I learn how to use it properly and artistically, the more it seems impressive to the pedestrian user and listener.
I work in analog because it is all I have ever had the privilege of owning and knowing about. After more then 20 years of farting around with it, I am just now starting to use it to its potential.
There's a million turns of the knobs and switches combined with the same number of notes and melodies that make or brake a recording.
Put your efforts and interests into that and the medium becomes irrelevant.
Cheers!