I was thinking about this today and for me at least, I think the things to learn are -
a) following (improving on that one
)
b) control (spinning, balance, esp in dips etc) &
c) style (posture, what to do with arms, how I step etc).
I still have a lot to work on for b) so I suppose that's where I want to focus for the next while, and maybe the style will develop as I do that. I agree that watching other really good dancers can be a great place to get style ideas and then see what works for you.