I play piano every so often, I am relearning all the music I had before and it's amazing to see my fingers go where they should even though I can't hear a thing. I can tell when I've messed up, since my fingers don't feel right. Can't really explain it.
The one piece of music that I am finding it real hard to master is Handel's Hallelujah Chorus. I am working on all the pieces for The Messiah. It is slow going, but I will get there.