Why do they all paint shoulder dragons, the same color, the same tattoo artist, but the tattoos are so different? One is mine and the other is someone else's.

Tattoos actually have a lot to do with whether the skin is attached or not. People with different skin colors and different skins will have different effects by tattooing the same pattern. Height, fatness and thinness can also affect tattoos. Your tattoo is obviously a little stretched than the person in the second picture. But in fact, I think the tattoo artist painted the dragon with too many cyan tones, even blue. The second picture is obviously dark because of too many green tones, but it does not rule out the problem of shooting light.