Pain is experienced differently from person to person. For most people, it’s difficult to tell what’s good and what’s bad. The best advice is that if you’re afraid of the pain, don’t get tattooed. If you’re just curious about what place on your body will hurt the most if you get it tattooed… then just do it and find out. Everyone’s experience will be different, so relying on someone else to say “this spot is good, that spot is bad” isn’t a great way to gather information.