I think that dirty residue is still with us! So many young pianists these days get praised for having a tone like "ice" or "cold crystals" or whatever nonsense. Why does everyone want to sound like a barren winter? I also seem to remember in his liner notes for Yundi Li's DVD w/Liszt Sonata, Carsten Dürer praises him for not being "Romantic" or "mysterious" or something of the sort. If you want I will dig up the exact quote. Well, Yundi Li is frankly a dry pianist, and his DVD of the Liszt sonata proves this without a doubt. He sounds like a winter wind with absolutely no humidity whatsoever. And this is good?!
I'm sure every generation gets fed a preconcieved ideal of how their playing is supposed to be... One way or another, all musicians must start from blind imitation. The other option is to reinvent the wheel, but that's impossible, the student would have to live in a vacuum.
It also makes sense that the more secluded student would have less popular influence to conform. I believe Chopin lived in a cultural backwater, where he had more freedom to develop his unique style. Perhaps if he'd grown up in more of a cultural hub he'd have been more conformist?
Either way, the student must learn to think for himself at some point, as a natural stage of development. Maybe it's when one generation of pianist tries to force their ideal on the next is how reactionary tastes come about, the resentful students rebelling when they begin to think for themselves.
My only qualification for an interpretation are the reasons behind the decisions... "because I want to", or a smirk are pretty weak reasons, likely the decisions of an immature mind. The best interpretive decisions are well thought out - "I did it like this because I wanted to get a sighing effect that goes well with the character of the piece, and I ended it that way in order to give a sharper contrast with the following section..."
I can respect anyone who can give well thought reasons for their decisions.