Fifth positions, heads, musicality, energy. Not technical things so much-getting your leg higher or doing more turns but things that would set you apart from other dancers. The only way you can be different is to be yourself If you don't find your spirit and reveal it, you just look like every other dancer.
Although we do come from a silent profession, it is important for us to verbalize what we want to say. (As I tell my students): you could love someone all your life, but if you never say it how are they going to know? There comes a point when you have to say what you mean, which makes you scream louder when you dance.