I'm learning pretty advanced pieces... well, for my standards... I have a couple friends who play a bit of piano who've had lessons in the past - they are always impressed with the pieces I play, but I'm secretly more impressed with their technique (even if it's exhibited in a piece that's a lot more elementary).
The great advantage of learning on my own has been being able to learn exactly what I want to play, even spending a lot of time on pieces that I am not ready for technically and expressively.
There are some drawbacks, of course; I have very little understanding of theory (although I am absolutely fascinated by it!) ... learning that on my own has been difficult. Also, my sight reading is somewhat poor
Was that aimed at me
ps: I guess the most famous self-taught pianist has to be Godowsky, or is my info incorrect?
I am wondering how many people who use this site have taught themselves to play the piano, and done everything themselves throughout their years of playing and reached a good/very good standard.