I guess that as a tattoo artist, I have a different point of view. I charged $150 an hour for black and grey, and $200/h for color. I was the cheapest artist in my shop. But of that $150 I only got $75, and as a tattoo artist, you only get paid the hours you are actually tattooing. Which means if I worked a 12 hour day and only did an hour of actual tattooing, I made $75 for 12 hours. Which isn't very good at all. I also ended up damaging the tendons in my hand because the vibrating, 1lb machine, isn't good for your hands, apparently. I guess I was also just raised where you tip when you get good service/work because you appreciate the person that did that service for you. Because it is you giving money directly to them, not the business they work for. I totally get the cultural difference on tipping though, I'm just trying to portray the other point of view.