At the moment, the only thing I really take any issue with is the impression that you only explore the idea of giving joy. I'm not saying that isn't a valid way to go, just that there are other avenues.
Also, Warhol's quote is one I take with a grain of salt, like most of the things he said over his career. Like Marcel DuChamp, Andy was notorious for his off-kilter quotations used to avoid having to be on the nose about his art.
That depends. What are you trying to accomplish?
I would explore more points than giving joy but honestly there are too many to cover. So many things come into play with being a magician/ artist but I do feel that spectators and giving them joy and happiness are key.