Answer:
I am the best thing that can happen after a stick hits a ball.
I go around in circles, but always straight ahead, never complain, no matter where I am led.
I am the same written forward backward and upside down.
I am a band that does not perform sing or act.
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate, yet I have my own style of music. What am I?
What age most travelers have?