Knowing how to lead a bunch of turns is a great skill, but knowing when (and when not) to lead them is an even better one.
Knowing how to style when following is a great skill, but knowing when (and when not) to do it while maintaining your connection with your partner is an even better one.
Leaders- Awareness of your and your partner's abilities, who and what is around you, and the mood the music is conveying is very important. Adapting to these factors (among others) will help make you even better than you already are.
Followers- To quote someone famous (bonus points for whoever can figure out who it is):
I'll be honest: I got fooled by the first two videos.
Oh... and watch out for cyclists!