Nothing is more relaxing to me then art. Drawing particularly. Do you like drawing? I'm a big fan of charcoal. 
I love to draw with pencils but I am not very good at it
Art is in the eye of the beholder. If you think it looks good, It looks good. 
Yes drawing has been popular throughout history - even in caves
I wonder was it a way to communicate in caves not just for pleasure? 
I am not sure but it is one of the simplest means of communicating
Interesting. I never looked of it as a way communication. 
Yes hieroglyphics are a very basic form of drawing which communicated ideas