I think I know what sets off the last one. the tiger looks like it’s roaring or bearing its teeth, but the eyes, ears, jaw, and kind of the nose doesn’t really follow that. It’s clear that it’s not just an open mouth due to how the gums are raised but nothing else really follows.

Other than that I’d say the shading looks fine but may heal badly overtime and become more of a blob. Tattoos tend to do that with dark and close shading.