I took some maco shots of bugs before. I thought they where good, sharp and detailed.
However, the more experienced people constructively criticized how my lighting was so bad (even though there was plenty of light from the flash).
It had some unsightly shadows.
I notice many photographers try to get no shadows at all with well diffused lighting for most photos.
When is it usually better to have well diffused lighting and when is it better to have some dramatic shadows to help add some depth ?