I love to watch people dancing. I don't have a specific type I like most though. Not good at it myself, what about you?
I love to dance! I am active in theatrical dance, which is sometimes called concert dance. I perform on a stage a few times per month.
That must be fun and somewhat athletic. Is it hard to do theatrical dancing?
It can be difficult to learn the choreography, but once we practice the repertoire of movements, it becomes easy! It's a rush to perform onstage! 
I used to sing in front of people but starting getting too much stage fright to continue.
Yes, it can be scary. There are other activities that have dance-like properties. You can try martial arts, synchronized swimming or gymnastics!