Another key aspect would probably be imagination - you have to be able to come up with your own unique tricks, help the team to design and co-ordinate new routines, and turn a simple performance into something extraordinary.
Being dedicated is also vital. You have to be motivated to fly and practise the same thing over and over again.
However, you don’t need all of these - you only really need a few that you are really good at. The team will help you with the rest if you join.